A Story from the Field: A Home with Three Four-Legged Family Members

Khun Thanawat and his wife live in a single-storey detached house in a housing estate off Phatthanakan Road in Suan Luang district, Bangkok. They have no children, but they do have three four-legged family members: an eight-year-old mixed-breed dog called Khao Tom and two cats, Mali and Som-O. All three live indoors. They sleep on the sofa, wander every room, and have their own corner next to the kitchen with a dog bed and a cat litter tray.

During the floods of 2026, water from the local canal spilled into the estate and entered the house to about ankle height for several days. The couple boarded their pets at the pet hotel of a veterinary clinic they trusted and stayed with a friend in a condominium. When the water receded and they came home, the house was coated in a thin film of mud. The dog bed and the cats' scratching mat were soaked through. The litter in the tray had set into a solid block. And the house smelled of a mixture of mud, mustiness and old pet urine that had been absorbed into the tile grout years ago and was now released all over again by the moisture.

Thanawat wanted to bring his pets home as soon as possible, but he was worried. "If we use strong chemicals, what happens when the dog and cats lick the floor? If we use ozone, will they be able to breathe?" He had read that pets can be more sensitive to chemicals and gases than people, so he did not want to start anything until he understood the process clearly.

These are exactly the questions pet owners in Suan Luang, Prawet, Bang Na and Phra Khanong ask our team most often. This article answers them one by one and walks through a process that lets both people and pets return home safely.

Why Homes with Pets Are Harder to Restore After a Flood

• Layered odors. On top of the mud and musty smells, there are pet urine and body odors stored in grout, rugs, sofas and door frames. Moisture from the flood reactivates these old odors and makes them stronger than they have been for years.
• Pet belongings absorb water easily. Dog beds, cat cushions, carpet-covered cat trees, scratching posts and pet blankets are all made of materials that soak up water and odor.
• Pets live close to the floor. Dogs and cats walk, sleep and groom themselves at floor level, so they come into contact with germs and residues on the floor far more than people do.
• Fur traps moisture and dust. Fur that collects in room corners and under furniture holds moisture and becomes a breeding ground for mold.
• Owners are understandably cautious. Many households therefore clean only lightly with plain water, which is not enough for a home that has been through a flood.

Pet homes also tend to have more soft furnishings in daily use, such as throws on the sofa, washable covers, rugs for grip on slippery tiles and blankets in favourite sleeping spots. Each of these is another place where floodwater, mud and odor can hide.

Risks Every Pet Owner Should Know About, for People and Animals

Leptospirosis. Known in Thailand as "rat urine fever", leptospirosis spreads through water and soil contaminated by the urine of infected rats, and it is a well-known risk after floods. It can affect both people and dogs. Owners should watch for signs such as lethargy, loss of appetite, fever, vomiting, or yellowing of the eyes and gums, and take the animal to a veterinarian straight away. People who develop a high fever and muscle pain after wading through floodwater should also see a doctor promptly.

Skin and paw problems. Animals that walk on floors still carrying mud or flood residue may develop irritation or infections on their paw pads and skin.

Mold and allergies. Mold spores in a damp house can trigger allergy symptoms in people and in some pets, such as sneezing, itchy skin or excessive licking and grooming.

Chemical residues. Using concentrated bleach, or mixing several cleaning products without rinsing properly, can leave residues that pets swallow when they lick the floor or their paws.

If your pet shows any unusual symptoms after the flood, consult a veterinarian first. This article is information about cleaning your home. It is not medical or veterinary advice.

What Pet Owners Often Try, and Why It Falls Short

• Mopping with water or scented floor cleaner. This does not disinfect thoroughly, and strong fragrances can bother animals whose sense of smell is many times more sensitive than ours.
• Pouring on concentrated bleach. The smell is overpowering in a closed house, and if it is not rinsed off completely it can remain on floors that pets lick.
• Air fresheners and essential-oil diffusers. They mask odors temporarily, but some essential oils are not suitable for cats.
• Washing pet beds and using them straight away. The foam inside beds that were soaked in floodwater usually still holds odor and germs even after the cover is washed.
• Running an ozone machine yourself without moving pets out. This is the most dangerous mistake of all. High concentrations of ozone irritate the airways of people and animals. Never do this.

The Solution: A Structured Disinfection and Ozone Process by World Health Disinfection

Our disinfection fogging service uses CHEMGENE HLD4H applied as an ultra-low-volume (ULV) fine mist over floors, walls, skirting boards, grout lines and the corners where pets like to sleep. This helps reduce bacteria, viruses and mold on surfaces that were in contact with floodwater.

Our ozone treatment service uses ozone gas, which spreads throughout closed rooms and helps break down musty, muddy and pet odor molecules embedded in the space, as well as dealing with airborne mold spores. Ozone breaks down back into oxygen over time and once ventilation is complete, so it does not leave behind perfume or the kind of residue that air-freshener sprays can.

Why use both? Fogging works on surfaces: the floor your dog lies on, the grout next to the litter tray, the skirting board your cat rubs against. Ozone works on the air and on odor molecules spread throughout the room, including places a mist cannot easily settle, such as the space under furniture, inside cupboards with open doors and high corners near the ceiling. In a pet home, where odors come from many small sources spread around every room, combining the two gives a far more complete result than either method alone. It also means you do not need to scrub every surface with strong chemicals yourself, which is exactly what many careful owners want to avoid.

Step-by-Step Process for Homes with Dogs and Cats

1. Survey and plan the pet move. The team surveys the house, looks at the areas your pets use, and sets a date and time for the work so you can arrange temporary accommodation for your animals in advance.
2. Move every animal out of the house. Dogs, cats, birds, rabbits, fish and every small animal, along with indoor plants, must stay outside the house throughout fogging, ozone treatment and ventilation. If you have an aquarium that cannot be moved, tell the team in advance so a specific plan can be made.
3. Put pet items away. Food and water bowls, dry food, treats, toys and pet medicines should be removed from the area or sealed in closed containers. Beds and cushions that were soaked by floodwater are best thrown away.
4. Disinfection fogging. Chemgene HLD4H is applied throughout the house, with special attention to floors, room corners, grout lines and the areas around the litter tray and pet beds.
5. Ozone treatment. Rooms are closed and the ozone generator runs for a time based on the size of the house and the strength of the odor.
6. Ventilate thoroughly. Doors and windows are opened for the full time the team specifies. For homes with pets, the team recommends allowing extra ventilation time before animals come back in.
7. Wipe pet areas with clean water. Before bringing pets home, wipe the floor around their beds and food bowls once more with clean water and let it dry.
8. Bring your pets home and observe them. On the first day back, keep an eye on your pets' behaviour. If anything seems unusual, consult your veterinarian.

Preparing for the Appointment: A Checklist for Pet Owners

• Book temporary accommodation for your pets, such as a pet hotel, a relative's home or a friend's house, for at least half a day to a full day, according to the team's advice.
• Pack food, water, any regular medication and familiar items to reduce stress while they are away.
• Throw away old cat litter and clean the litter tray.
• Separate beds, cushions and fabric toys that were soaked by floodwater to throw away, or wash them in hot water if the material allows.
• If you have an aquarium or animals that are difficult to move, tell the team on the survey day.
• While you wait, wipe high-touch surfaces used by people, such as door handles and tables, with the Chemgene HLD4H 750 ml disinfectant spray, keeping the spray out of pets' reach and following the label.

The First Day Back: Helping Your Pets Settle In

• Leave some windows open for a while longer so the house stays well ventilated while your pets explore.
• Put clean water, food and new bedding in the same places your pets are used to, to reduce stress.
• Fill the freshly washed litter tray with new litter.
• Watch for changes in eating, breathing, sneezing or scratching during the first one or two days.
• If anything seems unusual, or if you suspect your pet was exposed to floodwater during the evacuation, consult your veterinarian.

Many animals need a little time to adjust when the smell of their home has changed. Giving them time and staying close on the first day helps them feel safe again more quickly. Cats in particular may hide or sniff every corner before settling, which is normal behaviour after a change in their environment.

Pet Items: Keep, Wash or Replace?

Sorting your pets' belongings is one of the first jobs after the water goes down. A simple rule of thumb helps you decide quickly:

• Replace anything soft and porous that was soaked in floodwater: dog beds, cat cushions, carpet-covered cat trees, fabric scratching posts, rope toys and blankets that cannot be washed hot. The foam and fibres inside hold contamination that ordinary washing does not remove.
• Wash and disinfect hard items such as stainless-steel or ceramic bowls, plastic carriers, litter trays, hard toys, leads with metal clips and grooming tools. Wash with detergent, rinse well, disinfect according to the product label, rinse again with clean water and dry completely before your pet uses them.
• Throw away any pet food, treats or medicines that were in contact with floodwater or stored in a room that stayed damp, even if the bag still looks sealed.
• Check carefully items that were not submerged but stayed in a humid room, such as collars, harnesses and fabric carriers. If they smell musty or show spots, wash them or replace them.

Lessons for Next Time: A Simple Pet Flood Plan

Suan Luang and nearby districts sit in low-lying eastern Bangkok, where canals can overflow during heavy rain. A little planning makes the next emergency much easier for you and your animals:

• Keep a pet go-bag ready with a few days of food, medicines, a leash, a carrier, vaccination records and a recent photo of each animal.
• Agree in advance with a pet hotel, clinic or relative on higher ground where your pets can stay.
• Store pet food and litter on a high shelf rather than on the floor.
• Make sure every pet has identification, such as a tag or microchip, in case you are separated during an evacuation.

Dealing with Old Pet Urine Odors That the Flood Woke Up

One of the most frustrating problems for pet owners after a flood is the return of old urine smells. Over the years, small accidents soak into porous grout, the underside of laminate flooring, the bottom edges of doors and the backing of rugs. When everything was dry, the smell was faint or unnoticeable. Floodwater re-wets those deposits and releases the odor again, sometimes more strongly than ever.

Ozone treatment is very helpful for reducing these odors in the air and on surfaces across the whole house. However, where urine has soaked deep into porous materials, a combination of approaches usually works best:

• Identify the hotspots. A torch at a low angle can help you spot stains along grout lines and skirting boards.
• Remove and replace rugs and mats that were both soaked by floodwater and previously marked by pets.
• Clean grout hotspots thoroughly, and consider regrouting areas where odor remains after treatment.
• Check the bottom of wooden doors and door frames, which can absorb both floodwater and urine.
• After treatment, clean any new accidents quickly so that odors do not build up again in the restored house.

The team will point out the likely hotspots during the survey and include them in the fogging and ozone plan, so that nothing important is missed on the day of treatment.

10 Reasons Pet Owners in Suan Luang Choose WHD

1. There is a clear process for moving pets out and for when they can come back, so you never have to guess.
2. Floors and the corners where pets live are disinfected thoroughly through our disinfection fogging service.
3. Musty and pet odors embedded in rooms are reduced through our ozone treatment service.
4. It uses CHEMGENE HLD4H in an amount suited to the space.
5. There is no need to rely on perfumes or air fresheners that may bother sensitive animal noses.
6. The team recommends extra ventilation time for homes with pets.
7. You get advice on which pet items to throw away and which can be washed and reused.
8. It can be combined with our dust mite removal service for sofas and mattresses that pets love to sleep on.
9. The area around the house can be treated with our mosquito spraying service to reduce mosquitoes, which carry heartworm in dogs and cats.
10. Booking is easy, and appointments can be timed around your pets' temporary stay, covering Suan Luang, Prawet, Bang Na and Phra Khanong.

Before and After Disinfection and Ozone Treatment

Customer Voice (Example Scenario)

"From the survey day, the team explained how long our pets needed to stay away and how to store their bowls and food. Once the work and ventilation were done, we brought Khao Tom, Mali and Som-O home. The house doesn't smell musty any more. They explored every room and then curled up and slept like normal."

— Khun Thanawat, detached house, Suan Luang district (example scenario)

Frequently Asked Questions

Q: How long do pets need to stay out of the house?
A: It depends on the size of the house and the assessed treatment time. The team will give you a clear time on the survey day and recommends allowing extra ventilation time for homes with pets.

Q: Can I keep my cat in the bathroom during treatment?
A: No. Every animal must be outside the house, because ozone can travel under doors and through vents.

Q: Can pets lick the floor after fogging?
A: Make sure the floor is completely dry, ventilation is complete, and the areas pets use most have been wiped with clean water before bringing them home.

Q: What about an aquarium that cannot be moved?
A: Tell the team on the survey day so a specific plan can be made, such as moving the fish to a temporary container outside the house or adjusting the treatment area.

Q: Can ozone help with cat urine smells in the grout?
A: It helps reduce odor in the air and on surfaces. If the smell has soaked deep into grout or porous materials, spot cleaning or regrouting may also be needed.

Q: Which areas do you cover?
A: Suan Luang, Prawet, Bang Na, Phra Khanong, On Nut and other areas of Bangkok and its vicinity. Contact LINE @whd268 for details.

A Clean, Safe Home, Ready to Welcome Your Pets Back

Book a survey for your pet-friendly home in Suan Luang or nearby areas.

See Disinfection Service – Click Here

Book Ozone Treatment – Click Here

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com

Related Links

• Residential ozone disinfection
• Ozone treatment for odors and chemical residue
• Dust mite removal service
• All articles

Health references: World Health Organization (WHO): Floods · Department of Disease Control, Thailand