try it out yourself. heres the steps on how to:
-get a boy and girl of the same breed, with personalities that rarely fight(thats
optional)
-they must be fed ONLY milk and dry food/natural dog food, either one
-you can give them baths when needed
-u can play toys like pull ropes, tennis balls, or rubber bones. but not often
they have to cuddle 100x or more
-no walks or contests for the female. you can for the male, but i wouldnt recommend it
-keep doing this and later you'll see your female fat. she should be fat, lazy and moody
and stuff. after a few weeks later she will have a pup
hope it helps
got any doubts? visit my website http://nintendogs4ever.webstarts.com/index.html and go to the breeding page for more info

be patient. or it could take a few or alot of tries. you don't necessarily have to try
this, but it could work