Quote Originally Posted by dragondawg
With the muscle weakness still present are you sure the Hypothyroidism is under control? When was the last time you had a T4 test run on the dog by the Vet? Likewise insufficient Thyroid will yield a lethargic dog with low energy, low metabolism and overweight.

Normally weight control in a dog is very simple: Less food, less dog. More food, more dog. In a hypothyroid dog if the hormone level is not in normal range then less food, less energy, lower metabolism, more dog. Neither is a high protein food going to cause weight loss if the thyroid is still too low. More likely it will add weight.

Rather than experimenting with diets, you really need to get with the Vet to confirm the thyroid is at normal levels. Ask the Vet if the weight loss observed thus far(?) is what s/he would have expected. And ask the Vet to explain the continued muscle weakness.
We just got her on Sat. She saw the vet recently & has been loosing weight. Her old owners never walked her, they let her turn into a fat blob. Shes not a little fat shes VERY fat & has poor balance as the fat gets in the way.

She has a lot of energy, as she will jog & loves walks