We are very sorry to hear about Brock. We are glad he has "YOU" to love him. As Corinna said, there is a reason he is with "YOU".
The BARF diet, Bones And Raw Food, should help him. We had never heard of this either untill now. Please keep us posted.
I'll post this beautiful pics of him when we met at Marymore.

I'm so glad he found "YOU".
Tom and Katz