When switching worlds or versions, in this case between any version above 1.7.5 or back, previously tamed wolves in the world become untamed and walk around aimlessly while sitting. This also happens with the cats, but they stay the same instead of turning into ocelots. They both will run away, but as i get near them they see me, the ocelots run away but the dogs will see the bone in my hand and act as if they are normal wolves. After taming, they do regain the colored collar and name, but I am just curious as to why the wolves would stay sitting and become untamed......