Well, as far as working goes, I havent competed as of yet but my female seems to enjoy tracking the most.  I live in the country with lots of woods and my friend and I take our dogs in the woods to find familiar objects (toys) and friends that we will give a 15min head start.  we take turns working one anothers dogs and my female really seems good at it.  I would liike to do some SAR, but with my busy schedule I cant always just pick up and leave. ÂÂÂÂ
My Male is only about 5 mos. old.  He is fearless and I am doing some preliminary personal protection training with him.  I had him evaluated by a professionall trainer and the trainer is very excited about working with him in the future. He bite the tugs and sleeves with ferocity, then is ready to settle down and play nicely with strangers or anyone the very next minute. Its like an on and off switch.  He is still a puppy and I am careful not to overtrain.  but I think he is a great prospect as long as he remains such a stable dog.
Doug
