Great toy and my dog loves it. Difficult to remove the cylinder to fill with food and after removing it a few times it no longer locks in place.
I bought a Buster Cube[..]. They had one left of the larger type. I have two mini wieners, and I ended up buying a Mini Cube online here after they worked the big one over with trepidation. One liked it and one didn't. They both love the mini. I'm buying another mini cube and are going to give the big one to my son who's got a boxer. The mini doesn't roll much on tile, but maybe that's good to make them run around more. I'm trying to convince the wife to let me put the food bowl up and just use the mini cubes to feed them. I feed them Eukanuba, the small stuff which works well in the mini cube. The wieners love it.