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Cat 1Wytze Alers | more info (via: Wylio)
I have just noticed that behind my 7 year old cat’s front legs are two swollen moveable lumps. The right side being bigger. Her sister died from feline leukemia and I am concerned about what may be causing these lumps she has lost a little weight but is eating and drinking pretty much normally. She is an indoor cat with little to no contact with other cats (her preference) but she has a terrible case of fleas that we just cannot kill could they be causing an infection? (We’ve tried flea collars, powders, sprays, baths according to directions on the bottle along with scrubbing the house the buggers just won’t die.) Other than those fleas and more drool from licking and biting spots where they get her she gets occasionally warm. That’s all the possible symptoms I can think of.

Mandy

First, a few words about the fleas.

When a house has a heavy flea infestation even the best flea products will seem ineffective. That’s because one stage of the flea lifecycle, called the pupa, cannot be killed. Period. No flea product, no flea bomb, no amount of cleaning, no nuclear bomb, nothing can kill a flea pupa. And if your house is heavily infested, there are hundreds of thousands of flea pupae in residence. These pupae will continuously hatch, and make it appear that your flea products are ineffective.

Your only hope is to use a high quality flea product regularly on every pet in the house and to be patient. New fleas will hatch continuously, and then they will die. The flea problem will go away only when all of the pupae have hatched (which can take months) or when you move.

About the lumps: cats have lymph nodes behind their front legs, in the armpits. The lumps you see may be swollen lymph nodes. Infected flea bites can cause swollen lymph nodes, but so can other, more serious problems. I recommend that you take your cat to the vet to have the masses sampled (using fine needle aspiration, which doesn’t usually require anesthesia or sedation). Sampling the masses is the only way to know whether they are dangerous.