I am sorry Miss kitty is so ill.
Use dawn dish soap to thoroughly remove any residue of the product. If it was made by Hartz or for dogs, she may be in serious trouble.
She should be seen by her vet as soon as they open.
some cats are quite allergic to flea products.
I sprinkle diatomaceous earth in corners of my home as it kills all insects and is quite safe.
Get it at a garden shop or online:
I am in Florida where fleas/bugs/worms are active 24/7/365 and it works like a charm for me.
I hope your babies and you get relief very fast.
Please let me know how she is doing.
Best wishes for Miss Kitty.
I am so glad she is OK! That s GREAT news!
Have the neurological symptoms disappeared?