When you live in an apartment and you live with a dog or dogs you have a moral responsibility to the other tenants to clean up behind your dog in common areas, if you want to let your apartment smell like a zoo that is fine, but the other tenants should not have to suffer.  Now if you let your dog shit on the side walk you are just a Trifalin motherfucker and should have your animal taken away because not only is it trifalin but it is illegal and presents a health hazard.