I have a 6 year old shih tzu whom has never been boarded. I also have a 5 month old maltese/shih tzu mix. The older dog does play with the pup at times and other times she snaps at her. She has never hurt her, just seems to get irrated with her. The older dog has started biting family members the last 2 years only if she doesnt get her way. I am boarding them next week for the first time. I asked that they be boarded together thinking that will help the older dog who has seperation anxiety. I believe the kennel they will be in is 8 feet by 10 feet. Has heated floors and a run etc. My question is this.....shall I let them be together in that kennel or shall I ask for them to be in seperate kennels side by side?? Do you think being confinded will make the older dog more aggressive toward the pup??? Any advice is appreciated!!! Thank you!