If it was me I wouldn't wait. That puppy needs to eat. If my puppies (I raise Yorkies and Dachshunds) won't eat I force feed them if they refuse any food. I try several different kinds and I also try hand feeding, I put some on the floor (some puppies like it better off the floor). If none of those work then I force feed. Puppies can't go a long time without food. If they do they lose the eat urge and may start dry-heaving. Then they may become lethargic and ill.