I always had a chain on my tb mare. She was race bred and trained, but never hit the track. I had it pass under the chin through the bottom metal circle, up through the right cheek metal, wrapped around the leather a couple times, back down through the left cheek metal, and hooked onto itself. Never had a problem with it, and only had to really use it a couple times, but she needed to have it on not cause she was a crazy horse, just because she thought she could get away with stuff on the ground, but if the chain was on she was perfect even if the lead wasn't clipped to the chain. I personally don't think he needs that much more weight, I personally don't see his ribs, the only thing I see is a lack of muscling which will be solved with work. He has more weight than I was ever able to keep on my mare. You could always see a rib or two on her, and the vet said that she was at a good weight in spite of that. He is a very cute horse. Makes me miss my tb.