A Security Blanket for a Dog?

Daisy has one! We call it bunny. She's on her second one although she could probably use a new one. You'd be surprised how hard they are to come by. We take it everywhere we go and yes it has to be washed. It all started when she was a puppy. We had placed the bunny in her cage when we left or when we were eating to keep her from begging. One night at dinner I heard the most peculiar noise. When I glanced over at Daisy I noticed that she was sucking the face of her bunny with a gentle whimper. I thought it strange at first, but I remembered how her dad used to do the same thing with a tennis ball. The habit stuck. She sucks bunny when she wakes up, when we come home, when company comes over, and after it's been washed. I often wonder if Doobie still does it.