My 3 yr. old Yorkiepoo will eat about 1/4 of her food, and refuses to touch the rest unless I hold her dish for her. Then she eats like she's starving, and licks the bowl clean. I've tried refusing to hold the dish for 4 days one time and she just quit eating completely. I don't know what to do, so I just give in twice and day and hold the dish. Any ideas?