My vet told me that the deworming medicine only kills the adult worms, so any eggs that may be in your kitty's system will develop and may not be killed if the medicine has already passed out of the system. I would take your kitty back to the vet. My vet sent my kitten home with one month worth...
My cat Sweetie, was recently put to sleep because of cancer. She was for the most part an outdoor cat. She was allowed in but often opted to stay out especially for the night. As she got older, especially after she was sick, she stayed in more. Sweetie lived for 13 years. We live in the country...
