I've noticed some talents are locked to specific races. Flying specific or Magic specific I under stand. But Animal care seems like it should be open to all races.
Example being I wanted to make a soft spoken pegasus character who would go into the animal care talents, but unfortunately, I learned I couldn't do this...
Maybe make the Earth Pony talent plant based? Like, maybe they can summon grabbing vines or poison flowers as attacks? Or maybe they can spawn pet versions of the living bushes that can drop fruit based healing items for you and your party?