@ramseyclea:
I didn't know incontinence was one of the symptoms of hypothyroidism. So, I'm kind of glad to hear that. I know the weight gain and low energy level are definitely symptoms (I suffer from hypothyroidism myself). I will tell the vet to do the ful panel. Thanks for all the advice! This is such a great resource!
There are many things that can be a result of low thyroid…. maybe not directly connected, but a off shoot of the condition. My OJ was loaded with hives... and regardless of what we gave him they would come back over and over... finally tested his thyroid and it was very, very low... put him on Soloxine and never another hive.... so while hives is not generally a symtom of low thyroid, the fact that it lowered immunities in other respects, hives popped up....
Not saying this is the cause... but again her age is pretty young for this problem, IMO. So best to rule out other things before moving on to hormones... and again I would still not rule out a UTI