Wanted to follow-up and let everyone know that I spoke in great length to my vet yesterday. First question he had was the age of the horse. After stating the horse was a yearling, my vet says the popping noise is from an asynchronization of growth. His bones are growing faster than his ligaments. He says it should clear up, but begin adding Buckeye Brand Growing Wind to his diet. He also recommends feeding this to all foals (can give with Omalene 300 grain), as it possibly could have been prevented as a weanling. He also mentioned that two injections of Vitamins A, D, E, and Se could help.
My vet has been an equine vet for approximately 30 years, and ALWAYS stresses it is important what horses are fed. Even though the good grain is more expensive (ex. Omalene 300), it is worth it in the long run. I had a problem with a different brand of grain at the beginning of the year, and had 5 horses get sick (one died). I have learned first hand why he stresses diet so much, and now buy the Omalene 300. Even though it is for pregnant mares, foals, yearlings, and nursing mares, I feed this to all of my horses (even my Stallion and non pregnant mares). They all do well on this diet, and maintain their weight (do not get overweight). Hope this helps!
Thanks, Carolyn