breed my pups or spay and neuter them?...they are 4 months so i have a while to think about it. i was not going to show them but i was thinking about doing either agility, herding, obidiance, rally, flyball, or lure competitions...not sure what yet but i will do something and i would really like to breed them atleast once but i heard that could increase the chances of cancer but lots of people emphesize to spay and neuter your pets...but i would really liek to breed them...what do you think...and would it be hard to sell the pups if i bred them...i need someone with expeirence to tell me how they did it and if they liked it or if they regretted it...thanxs in advance