There really isn't a quick way to gain its trust, it would probably take a few days. The best way is to just lay out some food/milk and set it away from you. Don't really make any moves towards it, just let it eat.
Each time you give it food move a little closer and take the food back in when you're done. Eventually you'll get close enough where you can attempt to touch it but like I said, it will take a while.








