Since I bought my mare a few months back I have been trying to get her to gain weight. She was skinny when I got her and is still around the same weight now. Her teeth were floated so that's not it and she has been wormed. I switched her to Strategy- Professional Formula GX with some Amplify. Do you think this will help? Does anyone have anyother tricks or ideas to help with weight? She isn't skin and bones (I'd guess a body score 3).