I walk my 2 dogs (Boxer 2 yrs old and Black Lab 3 yrs old) everyday , a mile or more each day. Against a lot of trainer beliefs, they walk on a leash with a splitter in front of me. They pull a bit, but stop and wait when the leash gets taught when I stop walking.My problem is that I can not stop my Boxer from whining everytime we see another dog. It appears to be a very playful but loud pitch whine (On the occassion that our Black Lab barks, our Boxer whines, it appears as though this is his form of communication, because he almost never barks). Along with this behavior he also is very prone to high levels of anxiety for small or non-apparent reasons. How do you de-sensatize a dog anxious to see other dogs ?