My 7 month old kitten has been having some diarrhea off an on since we got him a few weeks ago and we're trying to figure out the cause. Canned food seems to bother him so we've been sticking with only dry. He did sneak some of the other cat's wet food a couple times in the last week. He's been on an antibiotic (Clavamox) since last Thursday. He was wormed twice before we got him and once since. His stool was tested last Tuesday and the vet said he didn't have worms. He was also give a dose of Revolution. Today I noticed a tiny little cream colored streak (like 1/4" inch long at the most) on one of his back legs, near his rear and it almost looked like it was moving. About the size of a grain of rice. Could he have worms and it be causing diarrhea or could it be the Clavamox or something else? He's eating well and seems otherwise just fine.