What is the auto-cast priority for skills and talents?
For the most part, auto-cast priority appears to follow focus cost. That is, pets will use any ability that they have the focus to use. This is pretty simplistic, but it often works out reasonably well. For example, Growl costs only 15 focus whereas the focus dump skills cost 25, so Growl will always cast before a focus dump if it’s cooldown timer is up. Many of the more situational pet skills and talents have no focus cost at all, so that they can be used at any time in an emergency no matter who much focus your pet has available. These abilities are often best controlled manually.