If it were me, the first thing I'd worry about is not who's eggs they were. Instead, I'd be moving that Tom out of her pen. I'm not saying HE'S the guilty party. All's I'm saying is that he doesn't even need to be AT the party. And your sure you took in to account the differences in incubation? Do you want the hen to hatch out BOTH the turkeys AND the chickens? IME, if you let her hatch them both and fail to collect the chicken's chicks IMMEDIATELY after they hatch, most of the chicken chicks won't make it past their first day. Sad, but, most often, true.