Question: I have a TB Perch cross, gelding, 13 years old that maintains a very good weight no matter what. I live in SE Upstate NY and just want an appropriate regional mineral balancer. He only eats local grass hay and /or pasture. Which product do you recommend? Dr. Kellon: Your area has the very common problem of high iron and/or manganese with low copper and zinc.  A good choice for you is the U Balance Foundation pellet. The formulation addresses your common imbalances and being a pellet it is ideal for your horse's diet.