I can't be the only one having trouble with this.
In case you didn't know, the offensive abilities you pet has (e.g. bite, claw, charge, etc.) all have ranks. If you tame an animal at level 10, and use him until level 60, you need to learn higher level attack ranks to keep his DPS up. The problem is that doing this is complex. You can't just train the higher ranks from a trainer, like you would with growl. If you want, for example, rank 4 of bite, you need to go train a separate beast and use him and the ability for a while to "learn" the skill. Then you can teach it to your actual pet. Think that sounds complicated? It gets better. Not all animals have or can teach you these skill. if you want rank 4 of claw, you need to find one of a specific set of bears to learn it.
I remembered all this coming into Nost. The problem I had was that I couldn't find a resource that told me where to learn these things in vanilla. That is, until today. Today, I found an old forum post that gives one beast to learn every rank of each pet ability you can't learn from the trainer.
Here's a link: http://www.neoseeker.com/forums/3463/t8 ... -4-hunter/
Happy hunting
PS, tell me if there's a better resource. I couldn't find anything that applied to 1.12, but I'm pretty terrible at finding things online.