I whould rule if i was running a game that any training needed to perform advance training for it to be effective whould be include guide dog whould heal sit and be house trained, but not attack. maybe even thow up a price for skill group training sit, house broken bark, when allarmed, heal and shake. (basic stuff.)
As to animals beeing abused when running wild came out made a elven beastmaster charter. An animal trainer, with a focus on the skill for training to raise the cap to 7. Then baght a bunch of untrained animals and trained them to help on runs lot of work but he was a profesenal trainer. Basicaly by the time i was done did not need a group for most runs bring a pair of merlin hawks ok mage is covered a bandit trained to ride in a back pack to open locks, some hell hounds with custom made armor or musle is covered. Only thing missing was the hacker face and gunslinger. Oh wait the trainer was a gun slinger.