I may be dumb, but I can't see a buck in there. But your game does pose a question for me: You stated that you spotted him just before he went into his bed but you didn't get a good look at him and don't know what kind of buck he is. Under your hypothetical, if we don't know what kind of buck he is, why are we in such a hurry to determine if we're going to shoot or not?
I'm not a trophy hunter but I'm also not going to start letting lead (or non-lead) fly if I don't even know what I'm looking at.