Logan,

I hope Lily is OK I know it is scary. My yellow lab, Beener, had the same issues with his weight gain and scabs. There was also quite a strong odor on him. After a few dumb vets misdiagonsed him, a good vet drew blood and he ended up having thyroid problems. He was on thyroid meds for the rest of his life and he did fine on them. He lost the extra 35 pounds really quick and his skin cleared up and the odor went away within a very short time. I hope what Lily has is similar and nothing worse then that It really is scary, especially with the hip problems. Be healthy, Lily and keep your chin up.