boil some chicken livers (I know they are yuck) but, to
dogs thats a real treat...if he participates
in eating,,,then he could just be homesick and/or finicky, and mix the livers/cottagecheese/babyfood in w/the dog food to flip him back onto his food, and steadily wean him back off...
A lot of people suggest boiling chicken and rice mixture...