Seeing eye dogs are trained to poop on command.

Seeing eye dogs are perhaps the superheroes of domesticated animals. Every day, they help their blind or legally blind handlers make their way through a world riddled with speeding cars and shin-shattering coffee tables. This kind of responsibility however can only be earned after an extensive training period, which includes “special bathroom etiquette.” 

When dogs start their training as puppies, they’re taught to associate a verbal command with the permission to go ahead and start doing their business. The command varies depending on the trainer, but some are; “busy busy,” “do your business,” and “go time.” 

Dogs adopt stances depending on whether they’re pooping or peeing. If dog’s back feels flat, the owner knows that it’s peeing (even male dogs are trained to pee in the same squatting position as females), and that no clean-up is required. 

If the dog’s back feels rounded, the handler knows that clean up will be required, and proceeds to feel their way to its butt and tail to figure out exactly where. So a big thanks and congratulations to these dogs for mastering a skill that most other dogs, or even people couldn’t if they tried. 

(Source)