Hmmm. What size is his current litter box? Maybe a larger box will help prevent him from stepping in it? I use a larger storage box with high sides. Many use a rubbermaid, but I'm in the minority with a sterilite container. My young cats easily jump in/out of it without issues, but if you have older cats, the rubbermaid containers are easier to cut a "door". You can google our website for those pics. It's posted pretty often here, good luck!