He has had this belly since he was a weanling and I just can't get it to go away. He is fed 2x a day of Safe Choice Original 3# a feeding for a total of 6# daily. He is turned out 24/7 on 50 acre pasture. He is on Probios and a digestion supplement. He is exercised 2x a day for 10 min for a total of 20 min a day. He is getting GroStrong minerals has a free choice salt and mineral block.
Any Idea's why he look like this?!?