Did you do any diagnostics? Pale gums... blood work to make sure he wasn't anemic? Xrays to look at heart and abdomen?
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~Emergency Vet Tech
Berlin vom Spartanville 1/13/13
2008 - 7/23/12
"Take this trouble from me: Make sure my shepherd dog remains a working dog, for I have struggled all my life long for that aim." Max Von Stephanitz