Just want to clarify some of my reasons for starting this topic. I've raised rodents for a long time, I don't over crowd them...if anything they have more space than needed. I have also not run into to many problem feeders that haven't come out of it. My whole take is just the possibility of a "cleaner" rodent, not because I am currently having issues with animals I have. My wife raised gerbils for a long time and you would never known it as little as they urinate and they where very clean. I'm still thinking about trying even just one tub of them...but most likely not at the current prices I'm seeing.