Always! I've even used a leaf before when in a pinch (gotta love having a small dog with small output)! The only time I didn't is when my uncle insisted that I didn't need to up at his place in the Poconos. He said if I wasn't willing to go pick up the deer/fox/groundhog/etc. poo, then I shouldn't bother. I used to struggle with putting something so biodegradable in such a nonbiodegradable thing (still did it though), but now i buy the biodegradable bags, so that fixed that problem (I don't use what the apt complex provides anymore because those aren't biodegradable).