There is DNA testing available:
http://www.canineheritage.com/

http://www.vetdnacenter.com/canine.html

http://www.metamorphixinc.com/products3.html

http://www.orvis.com/store/productch...d=10572&bhcp=1

They're not always reliable or realistic. If you get your tests results back, take them with a grain of salt