My cat's poison limit?

[WeDesperatelyNeedFleaHelp]

Read the entire question before answering.

My cat is a small adult female of 7 years old. She is tiny for her size and only weighs about 6-7 lbs. We are putting flea medicine on her neck, but what is her limit? How much can she take before she gets seriously sick or dies? We applied it TWICE, but we washed it off with flea shampoo. We applied it a third time minutes ago and it has not been washed off of course. My cat had what appeared to be a miniature seizure and has not been eating regularly after the second time. However, my mother and I are severely entomophobic and having fleas is psychologically torturous to us, which is why we treat her so often. I don't want my cat to die, she's like a sister to me. How much more can she take? What are the potential risks of using medicine and how many times must I use it for those particular risks to come into play?

Also, in your experience, what is the BEST flea fogger to use to kill an infestation?

We also set off 3 foggers in a small house and did not vacuum up afterwards to let the poison seep into cracks and crevices. Is that equally deadly?

All of this took place in the course of 1 week approx

[FurballsMom]

Look for some of my old posts.  I just posted one today, too.  Diatomaceous earth is definitely the way to go inside the home.  Don't forget to take care of the outside of the home (not so much diatomaceous earth outside if it's been raining where you live).  Google something like "non toxic flea removal".  Do NOT use diatomaceous directly on pets.  It is non-toxic, but it is also fine particulate, so pets and people should not breathe this stuff.  Use a dust mask when applying.

Indoor/outdoor pets:  You have to take care of the outside of the home, because that's where they get new flea infestations.  Nematodes eat fleas.  So, you actually need to understand the entire life cycle of the flea and where they actually live outside.  That's the key to getting rid of them inside of the home when you have pets that go outside.

[AnnieBrooke]

The answer to the question will depend on exactly what flea treatment(s) you are using.  Some are very dangerous to over-apply.  For example, you should not use Advantage in the way you have described, my vet tells me it can cause cats to die when overused.  On the other hand, Frontline or Revolution do not get into the cat's kidneys, etc.  Have you spoken to a vet and used only veterinary products, or are all of the products you are using ones that can be gotten without a prescription?

You mention that you and your mother have serious issues with fleas, and yet you are fogging the house; this suggests a flea problem that has gotten big.  Is the cat your only pet?  If so perhaps it might be kinder to find her a new home if you think there will always be a flea problem if she is there.  I am afraid from what you are describing, the overload of treatment with flea shampoo, fogging and the drops will indeed damage her health.  And if she is the sole source of fleas, perhaps letting her go to a new home will also preserve your health, both from the fleas and from residual chemical effects of the fogging.

My best results when dealing with a cat and fleas have been to put Frontline (or sometimes Revolution, as my vet recommends it) on the cat, and to comb the cat with a flea comb every night (these are fine-toothed combs that the fleas get trapped in, and you then drown the fleas).  The cat pulls any fleas out of the environment because her body is warm, and I physically remove the fleas from the cat or they die because of the Frontline.  But I don't give even Frontline more than once a month.

The other thing to do is vacuum, to get all the flea eggs up out of the rug and from the couch, etc.