Karen, they have, I am sure. Riley does chase the cats, so they tend to come upstairs during the night while we are in bed asleep. I'm sure they have all been over it, from all the thuds, thumps, and other bumps I've been hearing the past few nights, ha ha haaa. I know the cats also come up during the day when I take the dogs out for their daily walk, generally runs an hour. I actually 'announce' it to the cats, so they will know we are leaving!

Sparkle and Crystal are the 2 who pay no mind to Riley or the dogs, just do their own thing and look at Riley with slitty eyes -- so funny, Riley stops in mid run and starts backing up FAST!