hi i am thinking of getting a whippet x pup,we already have a 5year old whippet dog that we`ve only had for 3months. he has free roam of the house and sleeps upstairs in spare room, we are thinking of crating the new pup at bedtime and during day when we are out. how do you think the new pup will take to this as the old dog has free roam of house or do you think the old dog would want to share the crate with him. The old dog was in a family with 3 other dogs not whippets.