Ha ha, this is in response to the big dog thread. I started letting Louie sleep with me as a housetraining aid -- I had potty pads in his playpen so he would go during the night, but I wanted to take him out at night instead. I tried a few different things, and when I tried keeping him on the bed with me, I found that he actually held it through the night! I guess he didn't want to lose his spot! Since I liked him learning to hold it longer, I let him keep sleeping with me. Plus I love cuddling. But at just under 4lbs I'm quite frightened I'll knock him off the bed or roll over on him!