The viv sounds a little small, but that shouldn't stop from eating. If it is WC then it could need more of a natural set up. Also I would try cooling basking spot down to 90, ambient 80 and a drop to 70/75 on a night. With the heavy breathing it could be a heat thing.

Is the bowl of water big enough for it to bath in? (around 1inch deep is perfect)
Is it very skitish?
Does it like being handled?