Hold meat, such as rotten flesh (don't worry, your wolf won't get poisoned or anything), and click on your wolf.
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Get out a raw porkchop and right click on it if the wolf is hurt.
The only animal you can feed is a wolf and that is after you have tamed it,if you have Mo'creatures then you do so by holding the food and right clicking same applies for wolves
feed a bone to a wolf you might need to give it more than one and you get bones from skeletons unless you are in creative mode
The only way you can disown a wolf is to kill it.
wolf collars cannot be dyed