Desmond is a sorcerer. You are his familar.

you have the ability to shape-shifting to a demi-human form and a full animal form

you always help him with spells,potions,and any other magical things

you two live in a tavern out in the enchanted forest. The forest is know for magical entities and ingredients.

that's were he found you and learned your his familar.

you have to wear a magical collar that keeps your magic under control along with keeping you from going feral