Pooches: Choosing Foster Dogs

From all the photos we've shown, it probably looks like we just took Levi in and threw him into our mix. But there were really a lot of behind-the-scenes events to make sure that all the pooches would be happy together. We know all dogs have some levels of dog acceptance and dog tolerance, and we had to take that into account when adding another dog into our home, especially since our dogs are aging, space is at a premium, and we don't have a backyard.
Here is the behind-the-scenes of how we made it work:

Dog Tolerance

While Mr. B rarely cares about other dogs, we know Miss M is a complete alpha. Like we wrote in our earlier post about gender issues, it seems male dogs can take Miss M's bossiness much better, so we're partial to submissive males. We had been keeping an eye out for males when we saw Levi at New Leash on Life needed a foster home.

Having Proper Dog Introductions

Even though we liked Levi, we knew it was really up to the pooches. We had to schedule a proper dog-to-dog introduction to see how they got along. We took the pooches to a neutral sidewalk, and walked them by each other to gauge their interest. The eventual idea is to see how they react with a couple of walk bys, then try to get them to walk as a pack at the end.  Twenty-six to Life just wrote a really good post about how she does dog intros (and she has handled a household with a German Shepherd and 3 pit bulls of varying ages).
During our intro Levi had very bad dog manners and kept getting in the pooches' faces and trying to play with them. While I never would have expected it, Miss M completely ignored him and wasn't bothered by his rude intro. Could it be because she also suffers from poor dog manners? With her acceptance, we knew we could take the next step of testing him in our home.

Monitoring Home Interactions

Even in our home we've been careful with the 3 dogs to make sure no one becomes possessive. Each dog is fed in their own bed to make sure they don't food guard. We give out treats separately, and we monitor toys to make sure there aren't any squabbles. None of the dogs are really resource-guarders, though Mr. B does get a little sad if anyone tries to take his pink stuffed toys:

Levi is still learning dog manners. He doesn't understand it's impolite to shove your face in another dogs' faces, luckily, our pooches are being very tolerant with him. He is also learning good habits by watching our dogs: he is learning to wait for food, wait to be excused from the crate, and to lay nicely without rolling around. We also bought this fantastic Adopt Me collar from Sirius Republic to advertise his 'single status' to anyone he meets. 

These are the steps we took to make sure all the dogs were happy in our home. Any other good advice for integrating foster dogs into your home?