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Did you know that “flea” is the common name for the order Siphonaptera, which includes 2,500 species of small flightless insects? While you might not care to learn about all 2,500, what is important is how they can impact your dog, and the rest of your household. Here’s what you should know about this pesky parasite and how you can keep your pup safe.
Fleas are flightless insects that live as external parasites on both mammals (like you and your dog) and birds. They feed on the blood of their hosts. Note that fleas don’t tend to live on humans since we lack the protection of feathers or fur, which makes it more challenging for them to reproduce. Even though we make lousy hosts, we can still be a tasty snack for a hungry flea. So, if there are fleas in your home, know that you can be bitten.

Fleas leave behind some telltale signs—on your dog, on you, and around your home. Here’s what to look for:
While itching can simply be a sign of allergies or dry skin, it can also mean fleas. If you have an itchy pet, you want to get to the root of why they are itchy so you can treat it. This is especially important if you think there are fleas in your home.
If your pup is constantly itching, or worse—biting at the spots where the fleas are biting them—you might see some patches of hair loss. The hair loss usually comes from the scratching and biting itself, or from an allergic reaction to flea bites. Because it can also signal more serious skin conditions, it’s worth having your vet take a look if you spot hair loss alongside itching.
If you see any welts or redness where your pup is itching or has lost hair, these could be from flea bites. The saliva of the flea can cause an allergic reaction.
If your pup is being bitten, they may have pale gums. This is because fleas feed off your pup’s blood and can cause your pup to become anemic.
The itching and discomfort of flea bites can cause your dog to become restless. Some dogs and breeds are more prone to restlessness. If your pup’s demeanor changes or the restlessness seems to come on suddenly, you might want to check for fleas.
If you have a serious flea problem in your home or yard, you might start to see bites on your ankles and maybe even your knees. Unlike a spider bite, a flea bite will only have one puncture.
Flea dirt isn’t actually dirt, it’s flea feces, and you’ll want to look carefully for these reddish-brown flecks. While they could be just regular dust or dirt tracked in from the outdoors, if you think you might have fleas in your home, this is another good clue.
To check for flea eggs, put on a pair of gloves and run your fingers through the carpet. You might need a magnifying glass to see the eggs on your gloves, but if you have fleas, you’ll likely see the eggs. When fleas are in your home, they lay their eggs in the carpet because it’s a safe place for them to grow and hatch undisturbed.

If you find fleas on your dog, you might want to start with a quick call to the vet to ask about topical treatment—especially if you think your pup is reacting to the bites. Use a flea shampoo recommended by your vet, and give your pup a warm, soapy bath. After the bath, work through their coat carefully with a special flea comb to get rid of the dead fleas and flea dirt. As you remove fleas, kill any that are still alive with the warm, soapy water. Using your hands can be challenging since fleas can jump large distances.
If you find fleas or flea bites on your pup, you will need to treat your house. As we mentioned, fleas typically lay their eggs in the carpet, so even if you don’t currently see any fleas, you might as they hatch. If you don’t treat your dog’s things and your home to ensure the fleas are completely gone, you might have a recurrence.
To get rid of these unwanted guests, start with a powerful vacuum on your carpets, dog bed, couch, and mattress. Once you’re done, remember not to let the vacuum bag linger. Throw it away outside your home. If you’re using a newer bagless model, empty the canister and ensure it is thoroughly cleaned out so no fleas are living in your vacuum.
Then, use an upholstery cleaner powered by steam. The hot, soapy water should kill anything left behind after you vacuum. Be especially diligent about the places your pup likes to sleep.
If the infestation is mild, wash all of your bedding and your pet’s in water that is as hot as you can safely use on the material. If your infestation is particularly bad, you may want to replace your pet’s bedding and maybe even your own.
Treat your home with an insecticide designed to kill all life stages of fleas, including eggs. This is the place where your best bet is to bring in a pro. Ensure that whatever they use is safe for your family and your pet. If not, consider staying elsewhere while your home is being treated. You will most likely need to be out of the house for at least a few hours while the chemicals dry.
There are many preventative options for your dog. Medications like Credelio, Frontline, and NexGard can be prescribed by your vet. For a three-month option, you can ask about Bravecto. There are also options for topical treatments and collars if your pup has contraindications for oral medication. Your vet can help you choose a preventative option that is best for your pup.
Your pup should take their preventative all year round. While fleas prefer warm weather, seeing them in the winter is not impossible, especially if you live in a part of the world with higher temperatures.
By using preventatives as directed, you will likely not need to worry about a flea infestation. However, if one does happen, now you are prepared!
The Ollie blog is devoted to helping pet parents lead healthier lives with their pups. If you want to learn more about our fresh, human-grade food, check out ollie.com. Marissa Taffer also contributed to this article.
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