A character with the animal trainign proficieny can train animals given enough time and animals have a certain number of tricks which they have the potential to know. This number is not known until after training has been attempted normally, so what happens if the character starts training an animal as a guard, which has a fairly high trick requirement and the creature does not have the required number of tricks? Is all that time wasted? Can the animal's training be swapped to something that requires less tricks like hunting? or could it be treated as being trained in hunting since many of the qualities in an animal trained for guarding are shared with hunting?
Is it possible to break "Guarding" down into individual pieces so that an animal with less than the required number, but still with a good number of tricks can be taught most of what makes a guard dog a guard dog? Is there a difference in what you can teach an animal with 2 tricks and 4?
My apologies if I have been sort of vague on details(numbers) I am not sure the forum policy on mentioning specific values.