
To be honest, if they are soiling their pens they are not being let out enough
for them. Each dog is different, and some need to go more often than others.
You say you are going to breed these dogs. How do you know that they are good enough to breed from? Are they hipscored? Are they eye-tested? Have they done well in shows? And if you are going to use your male on all your bitches, does his pedigree 'blend' well with all of them, or are you just going to take 'pot luck'?
I think you may be approaching this from the wrong direction.
JMO.