I'm with ya there.
The fact that the person keeps bringing items the facility refuses to use tells me the dog's owner doesn't know it is not being used and is being thrown away. Certainly this guy isn't that wasteful that he would want mice and "dirt" he brings in thrown away. But maybe he is.
I really don't know what is going on as the facts have been trickling in since the start of the thread and we really don't have good information on this person's method. We really only have a outside person's observations.
It may be completely logical but outside the norm. That doesn't mean it is wrong. I don't agree with many people's lifestyle but that doesn't make it wrong. I don't have to like it and they don't have to like mine.
I think a serious conversation needs to happen so both sides are completely clear on what is going to be done and what is not. It should be clearly defined.