I have been pretty quiet about this because it is a pretty gross topic, but I have to finally ask.
Can anyone tell me please what the fascination is with poop? I mean eating poop.

Bentley shows no interest in his own poop other than a quick sniff. Yes Bentley that did just come out of your butt.

However he wants to eat the cat's poop. I even have to watch when we are outside, because if he finds bird poop on the ground he attempts to lick it.
I feed this dog the best puppy kibble I think I could buy for him. But he wants to eat poop????? Maybe there is an untapped market in cat poop flavored dog food.

The reason I ask this now is because he had another incident today. I finally moved the cat's litter box out of the bathroom to next to the front door. The only place that is not inconvenient for us to have blocked off. Bentley and I come home from his grooming appointment and a visit with the grand humans. I block everything off as usual. I go about my business and then I realize, Bentley is too quiet. He had managed to knock the baby gate down and went to the cat's litter box and ate god knows how much poop. This evening he's been farting up a storm next to me in is sleep. Major noxious fumes.
I know the story in and of itself is funny, but I just don't get what is so special about poop. Nature's candy for dogs?!?!?! Nutrient deficiency? Sick and twisted dog? I'm at a loss.
I looked at him this evening after getting over being mad at him and said, "If cat poop is so good I might as well start getting you the cheep dog kibble." lol