Quote Originally Posted by AdoreMyDogs
My yellow lab had thyroid problems...he gained alot of weight and his coat was thinning and his skin would get scabby and have a terrible, obnixious odor. We took him to 3 vets before they identified the problem correctly and gave us thyroid pills. He took them for the rest of his life. His coat cleared up, hair grew back, and he began to lose weight almost immediately after we started him on his thyroxine (think that was the name of his thyroid pill).

He gained weight but it does not sound like he gained NEARLY as much as that golden you were talking of. I think his highest weight was 110 before we started him on the medicine if I remember correctly.
What pills did your vet give you for the thyroid problem?