How to get rid of parasites in more than one cat in the same household--
get advice and medication from your veterinarian. Chances are the vet
will give you pills or use liquid medication. Use a pillowcase or towel to
wrap the cat in to protect yourself from cat scratches and bites.
Your cat may become aware very quickly that you are trying to give him/her medications.
Try to have everything ready for your cat. When you see that the cat is calm and
it comes to you, that would be the time to administer the medicine.
Wash you hands after you are done.
De-worming medication is a type of poison.
You can use a pill plunger to administer medications.
You can buy a pill plunger from the vet or pet store.
Try not to give medication on the rugs. If the cat spits out the pill,
it would be hard to pick it up from the carpet; also liquid medication might
stain your carpet.
The Vet on youtube will show you how to give a cat a pill:
Professional Pet Sitting Services offered in the Upper to Mid-Pinellas County Area