Well she hasn't been wormed in awhile and I have about 6 other cats so its very likely she could. I was going to ask the vet to worm her but they don't want to do anything until they see if we can get her to eat and drink. She crys at the frig wanting to eat but she won't when you put food down. Crazy!! She acts likes shes hungry not a lost appetite. Have you heard worms might interfere with the silver. I will probably give it anyway but if worms do then I am going to tell my vet I want her to be wormed.