okay, I was wondering if there is a way to check for internal parasites other than getting a fecal done. can they check via a blood sample?

Reason Im asking is because Goliath still has not eaten, hence no poo to bring to vet, and he's lost some weight.

He is in a 15g long tank, identical hides, temps are 82-83 degrees cool side, 93-95 warm side, humidity 54%. He is in a low traffic area. I have offered him various things to eat, but to no avail. weaned mice, rat pups, grown mice.. I would try F/T, but the local pet stores here only carry pinky mice and that would be like half an appetizer for him.

Thanx.