It is not about being mad. It's called RESPECT. As a renter myself I would NEVER leave my pets crap in the yard.
That being said, I now have 2 indoor cats, used to have 3. My landlord was concerned but gave me the benefit of the doubt that I would keep the brand new apt. clean.
I did. Now I'm down to two. Been here 8 years...nada a problem.
Most rentals deny anyone w/ a pet, especially a dog, which is why I have not adopted one. Cats are more easily accepted....however, it's still a thin line.
I would LOVE to have a dog. But as a renter, I will not because most DO NOT accept your application.
Now, a nice landlord picking up my dog poo - I can respect that!