Hi, My English setter has just been diagnosed with a Thyroid problem, hes been ill for a little while now and has put of quite a bit of weigh because of this. He has been on tablets since Thursday, I wondered if anyone on here has this problem with their dogs and how long it took for your dog once on the tablets to get back to his "normal" self or if they do get back to their normal self. e.g not sleeping all the time but running about, also if they put on weight how soon did they start to lose it.