You're one of the most lovable, yet disgusting creatures on the planet, you know that?
(trots over to a nearby bush and starts sniffing again) pooping dog script full
(laughs) You're pushing your luck, buddy. You're one of the most lovable, yet disgusting
(whimpers and strains some more, finally letting out a relieved fart followed by a poop) You're one of the most lovable
End of Script. This script is a basic example and can be expanded or modified based on your needs. If you're looking for something educational, you could add elements about why dogs poop, how often they should be taken out, or tips on cleaning up after them. For an animated version, you could add more exaggerated expressions and scenarios.
(whining and straining)