I'm asking this because I think it's ridiculous to be able to handle someone else's loyal animal (e.g. a guard dog, animal companion) without training the animal to accept such handling.
Exclusive (DC 20): The animal takes directions only from the handler who taught it this trick. If an animal has both the exclusive and serve tricks, it takes directions only from the handler that taught it the exclusive trick and those creatures indicated by the trainer’s serve command. An animal with the exclusive trick does not take trick commands from others even if it is friendly or helpful toward them (such as through the result of a charm animal spell), though this does not prevent it from being controlled by other enchantment spells (such as dominate animal), and the animal still otherwise acts as a friendly or helpful creature when applicable. (Animal Archive, p. 9)
I really hope there is another way, besides the seeming need for a trick like Exclusive. Otherwise it seems you could always use Handle Animal on someone's else's animal, even an opponent's in combat! Wouldn't all the domesticated animals in a campaign world need this trick?
By "official" I mean any officially licensed material from WotC for D&D 3rd edition & 3.5 or any Paizo published Pathfinder products.
One of the best things about the Pathfinder RPG is that it really necessitates no “conversion” of your existing books and magazines. That shelf you have full of great adventures and sourcebooks (many of them very likely from Paizo)? You can still use everything on it with the Pathfinder RPG. In fact, that was what convinced me to come on board the Pathfinder RPG ship. I didn’t want to see all the great stuff that had been produced thus far swept under the rug.(Pathfinder Core Rulebook, p. 4)
So while the Pathfinder RPG is compatible with the 3.5 rules, it can be used without any other books. (Pathfinder Core Rulebook, p. 5)
But also rest assured that this is an upgrade of the d20 System, not a new edition of the game. This revision is compatible with all existing products, and those products can be used with the revision with only minor adjustments. (D&D 3.5 Players Handbook, p. 4)
This answer is correct, in that "Some 3.0 content is still 'current' for 3.5.". This is the official rule. So it stands to reason it's fully compatible in Pathfinder.