Did you do any diagnostics? Pale gums... blood work to make sure he wasn't anemic? Xrays to look at heart and abdomen?
Sent from Petguide.com Free App
~Emergency Vet Tech
Berlin vom Spartanville 1/13/13
5/25/07 - 2/9/15
2008 - 7/23/12
"Make sure my shepherd dog remains a working dog, for I have struggled all my life long for that aim." - Max Von Stephanitz