depends on what human food you mean. nothing fatty and there is a list of things yorkies should not have toxic. grapes, garlic, olives are top of the list
http://www.yorkietalk.com/forums/yor...oods-dogs.html. i do give my veggies they love green peppers, carrots and peas. I also will boil plain chicken once in awhile and break it up small and add to their kibble to mix it up a bit.