I built my rack today, an 4 shelf/8 32q tub based on the plastic Home Depot rack design, and once I get the heat tape in (Most likely Thursday), I'll be moving my current two and three more that I'm getting tomorrow into it.

Then something occurred to me. I've got three cats running around here. Do I have to worry about them pulling the tubs off of the shelf? Should I be devising some kind of locking system? I can't imagine that would be too hard. A simple plastic toggle of some kind should do it.

Anyone have any experience with this?