i believe ADULT dogs can go quite a few days without eating but i would imagine it would be quite bad for a younger dog.
have you tried a whole chicken back?? you mentioned he may be allergic to it... but would you feel comfortable giving it a try?? Mister doesnt mind eggs if they are mixed in with ANYTHING to give it some consistency but will not eat it straight up.
Chris- Husband, 04/30/77
Cailyn- Daughter, 07/05/99
Jeffrey- Son, 03/24/06
Alex- Son, 03/25/09
Mister- Black LabX, M, 08/06(?)
The Shadow Stalker- Gray Tux DSH, M, 04/04
The Mighty Hunter- Black Tux DSH, M, 04/04
Baby Girl- Tabby DMH, F, 12/03(?)
Frances- Tortie, DSH, F, 2007(?)