Common health issues during the rainy season

Rainy season in Thailand can last over five months in a year! It will take more than just an umbrella or a raincoat to take care of your cats and dogs because some diseases always come with the rain and they may come for our pets!

Here are five common pet diseases in the rainy season for you to be aware of, so that you can protect them, observe their symptoms and be their hero!


This disease and rainy season are like tea and toast. It’s not just humans who can be infected with this disease, but also mammals like cats and dogs.

Infection: If they come in contact with the infected carrier, like rats or other rodents. Or contact with bacteria from contaminated objects that can get into their body by an open wound, a scratch or through the membrane.

Symptoms: depending on how their antibodies respond to the bacteria, symptoms can be inactiveness, weakness, decreased appetite, diarrhea, vomit, changes in the frequency or amount of urination, fever, jaundice, acute kidney injury that can lead to death. 

Prevention: There’s a prevention vaccine for dogs that’s included in the annual vaccination but there’s none for cats. So based on their nature to hunt or walk around, you really need to keep your eyes on them.

Blood Parasites

Humidity is the best condition for ticks and fleas to hatch, and that’s when parasites come into the story.

Infection: infected by getting bit by ticks or fleas that then transfer bacteria into the pet’s bloodstream.

Symptoms: lethargy, decreased appetite, weight loss, high body temperature, fever and jaundice which if their body or gum turns to yellow, it means their condition is fatal and you need to take them to the veterinarian as soon as possible!

Prevention: keep your house and your pet clean or use ticks and fleas prevention pills.

Heartworm Disease

Our worst enemy in the rainy season is mosquitoes, they bite, cause annoyance and itchiness to our pet. And worst of all, they can infect our pets with diseases.

Infection: getting bitten by a mosquito and getting heartworm in their bloodstream. The heartworm will grow and relocate to the host’s heart and pulmonary artery.

Symptoms: itching, lethargy, decreased appetite, tiredness, cough, faint, edema, ascites, trouble breathing, Myocarditis and heart failure.

Prevention: get rid of mosquitoes in your house and around the area to prevent your pet from getting bitten.


Humidity is not only the cause of discomfort but also bacteria that can lead to skin infection.

Infection: sleeping outdoor, on the floor or wet surfaces. Playing in the rain and not getting dried properly.

Symptoms: itching, hot spots, pustules, patchy hair loss and body odor.

Prevention: keep them clean and keep their hair dry.

Respiratory Disease

Many diseases spread widely during the rainy season, like the flu or bronchitis which is infectious.

Infection: contact with contaminated objects, human hands, air, or even their own stress could cause it.. 

Symptoms: cough, sneeze, decreased appetite, fever, weakness, nasal mucus and tear, thick nasal mucus or dark colored ones, pant, dyspnea that can lead to pneumonia or death.

Prevention: annual vaccination, be in a ventilative atmosphere, avoid contact with infected pets.

🗨️ If you have any good tips on how to protect your paw friends from dangerous things that could come with rain and storm, please share your solutions with us on Facebook: MyFriend – Your Pet’s App or Instagram: @myfriendyourpetsapp !

This article is reviewed by the veterinarian from Small Animal Teaching Hospital, Faculty of Veterinary Science, Chulalongkorn University (CUVET)

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