Poo-eater 🤦‍♀️

So I have two older dogs 10yo Doodle and a 6yo Border Collie-Pit, my 4Mo Mini WILL NOT STOP eating their poo. I’m talking immediately/during them going, he’s eating it. How do I stop this? I really don’t have the time to supervise them in the backyard. Has anyone tried supplement type things that make it taste not good? Or something? Ughhh his breath is the worst now. 😓 And yes I give them dental treats and will be beginning a tooth brushing regimen very soon.

I want all the cuddles but cannot handle the nasty breath smell. 🤮