If you stay with this vet, you need to make it clear that you are not a person who expects the vet to perscribe you meds for everything, because there are people who think if they don't get anything from the vet then the vet wasn't listening! If you bought the meds from the vet, see if they'll buy them back, there's no reason they shouldn't since Sam's fine now and didn't need them. Definitely let him know about the prednisone, maybe he does have a reason for high dosing but he needs to make that clear with you before doing it. I have a vet that's not the most popular in this area mostly because she doesn't sugar coat or coddle her owners. I LOVE her and her partner vet and am never worried about voicing my concerns. If after you voice your concerns to him you don't feel justified or relieved in any way, unfortunately I would look for another vet.