Hi! I am new to BoxerWorld. I wish I would have known about the site sooner. There is so much great information. Anyway, we had 3 dogs; 2 boxers (12 and 3 yrs old) and 1 mini dachshund (3 yrs.). As of last night, though, we have 4 dogs. We got our newly adopted 13 month old boxer. Problem is his...