If he's really not eating at all, you need to get to the vet.
Otherwise, have you seen this?
Pup doesn't want to eat (picky eater?)
MACH3 Bretta Lee Wildhaus MXG MJG MXF MFB TQX HIT CGC TC
Glory B Wildhaus AX, AXJ, XF
"It is absurd to divide people into good and bad. People are either charming or tedious." - Oscar Wilde