@lifewithava I'd get the Thyroid Profile 5. I've had a number of dogs tested thru Hemopet; It's worth any additional cost or inconvenience because you'll receive an expert opinion: as with human doctors, few veterinarians really understand thyroid disease or thyroid testing because they don't deal with it often. Some veterinarians diagnose simply based on TSH and T4 levels, which really don't tell the whole story. Dr Dodd's and her crew deal with hypothyroid testing daily, and as a Hashimoto's sufferer myself I can't emphasize how vital it is to have an expert treating thyroid problems: A hypothyroid misdiagnosis can mean that an underlying problem is not diagnosed and treated. I trust Dr. Dodds 100%.
What symptoms make you think your parent's dog might have an underactive thyroid?