Wow, that does sound like worms. Especially whipworm (which would cause the belly area licking.) If it is whipworm it may take a few fecal tests to see any results (possibly even different vets.)

Koli is about 50 lbs and she gets about 1 1/2 cup of food a day. Before she got treated she was eating 2 1/2 cups and was loosing weight. Now at a cup and a half she gains weight easily.

Quote Originally Posted by slleipnir
Could worms make that happen? He seems really skinny...I've been feeding him like 4 cups of food a day (I increased it recently cause he seems too skinny to me...) How much do you feed you dogs (large dogs around 60 lbs)

Edit: I just read that worms can cause vomiting, diarrhea, etc. He also has diarrhea sometimes...not always though. He licks the fur/skin off the sides of his belly....I wonder if all this could be worms? I think I will check with my vet.