[Maded]

So the question has come up about what covers animal handling within the current rules set.

I'm of a mind that the Influence skill and an appropriate Knowledge skill should do the trick just fine. I've made the ruling that the Knowledge skill should be specific to the breed of animal, rather than just a generic Animal Handling Knowledge. I know the player's familiar with 5e and 4e handling it as a more generic skill covering just about every animal under the sun as the same thing, and seems to want a general beast-master type. I think that different animal breeds would more realistically require different styles of training methods and techniques.

This sound appropriate to you, or does anyone have further suggestions on how to handle Animal Handling in 6e?

[Michael Chandra]

I'd say a generic Critter or Paracritter knowledge skill lets you do basic stuff while a more specialised skill would let you do the complex training, completely agree for the rest.

[Xenon]

Rule wise it is [probably] just resolved with Influence and nothing else.

But your house rule using knowledge skills seems reasonable (and can probably be applied to other situations and skills as well, such as cooking, baking, composing music, sculpting, jewelry, gunsmith, etc as well as various uses of forgery)

[Finstersang]

It would also be a fitting Specialization for the Outdoors skill, and even Perception for when it comes to recognize what a
Critter is up to. It´s in a weird between-the-chairs position 

Thus, requiring additional Knowledge skills seems like a really good approach. I´d say that a generic "Animal Handling" Knowledge skill would be too broad to enable more than just some very basic things like trying to calm them down. For actual taming purposes, I´d require more specific Skills for canines, felines etc.