mine have eaten whole, putrid, bloated fish *gag* before and were just fine for it later. I nearly had a heart attack and then they decided to roll in the remains and ... think "worst smell ever" and you've got the idea. If dogs can digest raw chicken bones, my guess is those little itty fish bones shouldn't be an issue. . . I'm not an expert though. Could you call your vet? I'd have to guess out there you're not the only one who has taken your dawgs fishing with you and fed the small catches to them.