Quote Originally Posted by Trek-chick View Post
Dogs will have to sort out their pack status too so, there may be some agressive moments. I usually just let them sort it out themselves unless one dog is being hurt badly.
Ditto what everyone else is saying including the above. Have the dogs ever met before? Are they each generally ok with other dogs or is one or both dog-agressive? (I'm guessing no, but I had to ask because that's potentially a whole different ball game).

For the cats, we've done this a bunch of times. It helps that your cats are already ok with your dog and that you are bringing the new dog into their territory. I've never had to deal with a cat showing agression or causing the problem, but if you are more concerned with Beau's reaction, it's as simple as teaching him that the cats are also part of the pack. This means all initial interactions should be supervised (with Beau on a leash if he's not well trained to voice commands). If he makes ANY move towards the cat (outside of a desire to sniff), correct him. If you can have your dog in the room too...so Beau can see how the cats fit into the pack, that'll help. Again, this is all assuming that your cats are ok around a strange but calm dog. That's the only type of cat we've had, so I can't speak to cat-aggression! Like in the case of the dogs, there may be some hissing or growling or such...it's ok and normal. Just make sure that you are always in attendence until both animals visibly relax whenever they are together. Oh, and once everyone is comfortable with each other, don't let the cats rub up against the dogs when they are eating...recipe for disaster!

Good luck. Sounds like you will definitely have your hands full!