I have an eleven year old dog and a 4 1/2 month old dobe puppy. My pup stays in the crate when I'm away from home, but otherwise has free run of the house. Including sleeping with me at night. Before the pup my senior would always sleep with me at night, but now he sleeps in the pup's kennel instead of with the pup and me. I have never noticed signs of aggression between the two and they generally get along quite well. Each has their own dog bed which are identical. Has anyone else experienced this? I just don't want my senior guy to be uncomfortable. Thanks for any advice as this is my first post here, although I've been reading here for awhile.