We have 4 dogs (3 Pembroke Welsh Corgi's and a Siberian Husky), 8 puppies, a horse, and a gajillion fish. We also plan to foster another dog for the Logan County Humane Society within the next few weeks. My wife is a dog trainer though.
Another trainer at her work has 20 dogs, her license plate is 2MANYK9.
You just have to watch out with Boxer's b/c they are very overly bred. Read up on the breed standard (doesn't just make the dog pretty, but healtier as well) and have the dog checked out by a vet.