I am so sorry that you lost your sweet Lennox. May he run free at the bridge.
There is lots of information on Boxer World about what to look for when selecting a breeder.
This is an important link because it speaks to the health testing that is necessary: http://www.boxerworld.com/forums/vie...th-testing.htm
You can search for your local Boxer Club and they should be able to assist you in finding a reputable breeder. Good Luck in your search.