Well I found some vomit with roundworms in it today and I really can't believe this is happening again. The kittens were last treated at the end of September. Last flea treatment was in Oct. so I'm wondering if one of them ingested a flea to cause this. But it's December so I can't understand this problem. I'm calling the vet's office tomorrow but just wondering....has anyone ever had animals who kept getting worms?