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What are Mosquito Bites?

Mosquitoes might not seem to be a big problem for furry animals like dogs and cats, but your pets can still get bitten in areas with only thin hair coverage, such as the nose and ears. Dogs and cats experience the same itching and irritation around mosquito bites as humans, however a more serious concern is the spread of mosquito-borne diseases, especially heartworm. Heartworm is a parasite that causes life-threatening heart and lung infection in dogs and sometimes cats. It is carried from one animal to another via mosquitoes and it is relatively common in the United States. Protecting your dog or cat from mosquito bites is the best way to reduce the risk of heartworm infection. Mosquitoes pass through several stages in their life cycle. The eggs are laid by an adult female. She will choose a site close to water since mosquito eggs need water exposure to hatch; however the eggs can survive for several months unhatched if moisture is not present. The larva, sometimes called the “wriggler,” is a small worm that lives and feeds in the water, coming to the surface to breathe. The pupa or transition stage takes place just before the adult mosquito emerges. This phase is called the “tumbler” stage; the pupa remains in the water, but does not feed and develops a hard case that protects the developing adult fly. Shortly after emerging, mosquitoes will take to the air in the form that is best known. The females will bite humans and other animals such as dogs and cats, often spreading blood infections from one host to another. The entire mosquito life cycle usually takes about two weeks, but in ideal breeding conditions with high moisture levels, it may be as short as four days. Over the course of the summer, thousands of mosquitoes will be born and have the potential to bite and infect your dog or cat. Outdoor animals are more at risk, especially dogs or cats that spend a lot of time close to swampy areas or stagnant water.

Mosquitoes can be a nuisance for dogs and cats just as they are for humans. The bites cause itching and irritation, but more importantly they can also spread serious bacteria and parasite infections.

Mosquito Bites Average Cost

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Average Cost

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Symptoms of Mosquito Bites in Dogs

When dogs and cats are bitten by mosquitoes, they experience the same itching and irritation as humans. The following symptoms could indicate mosquito bites.

  • Constant scratching
  • Rubbing ears or nose against a rough surface
  • Red welts similar to mosquito bites in humans
  • Systemic illness from mosquito-borne parasite infection
  • Coughing
  • Respiratory difficulty
  • Lethargy or depression
  • Intolerance to exercise
  • Lack of appetite or weight loss
  • Vomiting (cats)

Types

These are some of the many different types of infection that can be carried by mosquitoes.

  • Heartworm
  • West Nile Virus
  • Eastern Equine Encephalitis
  • Systemic Lupus Erythematosus

Heartworm is the most common concern for dogs and cats.

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Causes of Mosquito Bites in Dogs

It’s impossible to eliminate all mosquitoes, but these are some factors to take into consideration.

  • Standing water around the house
  • Animal water bowls or troughs
  • Bird bath
  • Any ornamental pond
  • Untreated pool
  • Seepage from a septic tank
  • Water pooling in a tarp cover
  • Water pooling in a driveway pothole
  • Broken screens
  • Night lighting
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Diagnosis of Mosquito Bites in Dogs

Mosquito bites can be diagnosed based on signs of itching and irritation as well as the presence of mosquitoes. Bites that carry infection are undetectable from those that don’t, so heartworm is only found through regular testing, or when symptoms of illness are already present. 

A small blood sample can be used to detect the presence of heartworm-related proteins. It takes six months for an animal to test positive for infection, so it’s recommended that dogs be tested at least once annually after they are seven months old. Cats are not as typical a host for heartworm; the infection is less common and different testing regimes may be recommended by different veterinarians. In cats, few worms reach the adult stage, however the larvae can still cause fatal and sometimes sudden illness, so it’s important to get your cat tested often too. If your dog or cat tests positive for heartworm, chest X-rays or further tests may be ordered to evaluate the extent of the infection.

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Treatment of Mosquito Bites in Dogs

Insect repellent is often used to reduce mosquito bites in humans, but it can be unsafe for dogs and cats. Any human designed spray, especially those that contain DEET, may be toxic and should be avoided. Choose a repellant that is tested specifically on your pet, preferably with the advice of a veterinarian. Environmental repellants such as sandalwood or citronella candles may be more advisable if you cannot find a spray that is safe for pets.

If your dog or cat is suffering from severe discomfort related to mosquito bites the veterinarian may be able to prescribe or recommend a treatment to reduce the itching. Otherwise, no treatment is necessary. Dogs that test positive for mosquito-borne heartworm infection are usually treated with an arsenic-containing medication given in small doses over the course of several months. This medication is not safe to use in cats. No treatment is currently available for cats diagnosed with heartworm infection. However, monthly preventive medication can be given to both dogs and cats and is usually effective at eliminating the risk of infection.

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Recovery of Mosquito Bites in Dogs

Individual mosquito bites will heal in dogs and cats, but continued exposure increases the risk of infection. Taking steps to make your house and yard as mosquito free as possible in the summer months can reduce the chance that pets will be bitten by disease carrying insects. Since no mosquito elimination is foolproof, the best way to manage heartworm infection is with medication and regular testing. It’s important to be consistent and give each dose at the same time each month, since missed or late doses can impact the effectiveness of the treatment. Pets should be tested before beginning a treatment plan and after any lapse in medication.

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Mosquito Bites Average Cost

From 25 quotes ranging from $200 - $500

Average Cost

$250

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Mosquito Bites Questions and Advice from Veterinary Professionals

Need pet health advice? Ask a vet

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Ask a Vet

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Prince

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Pit bull/bulldog

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2 Years

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Moderate severity

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0 found helpful

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Moderate severity

Has Symptoms

We have a ton of mosquitos in our area. I have 2 dogs one long hair chihuahua and a pit bull/bulldog mix. My chihuahua is perfectly fine but my bully has been itching all over. I thought it was from a flea/tick bath shampoo I used because it seemed to start after that and worsened after I used it again. I stopped using it and gave him a nice cool bath with a medicated shampoo, with Benadryl 1mg/1lb twice a day. It seemed to get better for a few days. I missed a day of Benadryl and the itching came back . My vet isn’t open until tom

Sept. 16, 2018

Prince's Owner

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Winnie

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Pit bull

dog-age-icon

2 Years

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Mild severity

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0 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Mild severity

Has Symptoms

Itchy

Hello, Im just now reading about mosquito bites and its products with out knowing I sprayed my dog down with OFF (Deep woods) spray and took her to the park she was still bitten now she has all the swollen bumps(which look like tons of mosquito bites)and her skin looks irritaded and its really itchy. I'd like to know if there is a shampoo or lotion to put or wash her fur to help heal or help with irritaded skin? I'm now aware of the proper mosquito sprays for Winnie and will get it accordingly.

Aug. 9, 2018

Winnie's Owner

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0 Recommendations

You should bathe Winnie thoroughly with a mild sensitive dog shampoo; however you should visit your Veterinarian to be on the safe side especially if you live in an area affected by heartworm and you’re not giving Winnie appropriate preventative treatment. Regards Dr Callum Turner DVM N.B: OFF bug spray isn’t approved for use in dogs but may be used on the skin of humans; if Winnie shows any symptoms of DEET toxicity I would recommend that you contact the manufacturer on 1-800-558-5252 for product specific information. https://off.com/en/product/deep-woods/deep-woods-insect-repellent-v https://wagwalking.com/condition/deet-toxicity https://wagwalking.com/condition/heartworms

Aug. 10, 2018

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Dalmo

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Dalmation

dog-age-icon

8 Years

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Fair severity

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0 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Fair severity

Has Symptoms

Itching
Bump
Licking Bite
Red Area

I’m pretty sure my 8 year old Dalmatian has gotten hit by a mosquito he is constantly licking an area on his front paws, around his arm pit. It has a red small bump. I tried helping him, like scratching it for him: he tilts his head and shakes his leg in relief- I’m wondering if there’s anything I can give him, it seems to really bother him.

July 9, 2018

Dalmo's Owner

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0 Recommendations

Mosquito bites can be really annoying for humans and we understand that we were bit by a mosquito so it is understandable that a dog isn’t as understanding; the irritation will decrease with time but I’m more concerned about heartworm if you live in an area affected by it, if your not sure call your Veterinarian to ask so you can take preventative measures. Regards Dr Callum Turner DVM

July 9, 2018

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Pixel

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Bichon Frise

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6 Months

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Fair severity

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0 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Fair severity

Has Symptoms

Just The Skin Irritation

Hi! I have an 8 pound bichon/poodle mix 6 months olf. I noticed this morning he has 3 small red rashes on his hairless belly that have a slight bump in the center, most likely from a mosquito. If he isn't itching it or showing any odd behaviors, will they go away on their own? He is on interceptor for heartworm and intestinal parasites. I worry because of all the scary things you hear about mosquitoes in correlation with dog illnesses.

June 19, 2018

Pixel's Owner

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0 Recommendations

As you know, mosquitoes are vectors for heartworm, thankfully you are already giving a preventative against that; however other diseases (depending on your location) may also be carried by mosquitoes (see link below) and you should monitor Pixel for any symptoms listed. The bites should go down by themselves, just keep an eye on things; but if any other symptoms present or you’re generally concerned you should visit your Veterinarian. Regards Dr Callum Turner DVM https://wagwalking.com/condition/mosquito-borne-diseases

June 20, 2018

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Max

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Cavapoo

dog-age-icon

3 Years

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Mild severity

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0 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Mild severity

Has Symptoms

Can I give my dog heartworm prevention if he already has a mosquito bite? He has been licking himself since I got home , but I think it has been more than that because there was a mosquito in the kitchen filled with blood but we killed it already, he has been feeling good today but now he is itching mildly.

April 22, 2018

Max's Owner

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0 Recommendations

If you live in an area known for heartworm, you should have Max on a heartworm preventative medication already but you can give one now; however the best products are available only on prescription so you should consult with your Veterinarian. Regards Dr Callum Turner DVM https://heartgard.com/Pages/default.aspx

April 22, 2018

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Luna

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American Staffordshire Terrier

dog-age-icon

8 Months

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Moderate severity

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1 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Moderate severity

Has Symptoms

Itching

I noticed today that my girl Luna was covered in mosquito bites (25 bites just on her chest) after being outside on a farm with her Labrador bestie last night. Red welts and super itchy. She gets herself so worked up over the itching that she begins to pant. When she calms down she can breathe fine. Just looking to make her more comfortable, and wondering whether to take her to the vets when they open in a couple of hours?

Mosquito Bites Average Cost

From 25 quotes ranging from $200 - $500

Average Cost

$250

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