With any WC or overseas farmed animals a veterinary performed fecal and prophylactic de-worming are always a good idea. Your husbandry sounds good although I would tune down the hot spot a couple of degrees. Loose/fowl smelling stools can be a sign of some sort of digestive issue. The fact that it is a WC/farmed animal definitely raises suspicions towards something that should be checked out. Good luck and keep us updated.
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- Lon D.