Our puppies all go home around 10-12 weeks old min. Everything depends on the puppy. If they are on the smaller side they must stay longer. Yes, they are a LOT more work the older they get, but to me it's worth the peace of mind that they are ready for their new homes.
Hha it is VERY normal for a dog not to do both poop and pee in the same exact area. If you watch a dog go outside they do not usually go in the same areas either. Perhaps you could try a "poop" pad area and a "pee" pad area. Ours all have seperate areas.
In regards to laws of age you can visit this site:
http://www.animallaw.info/articles/o...pysalelaws.htm
or it is here to read easier:
How old must a puppy be prior to being offered for sale?”
The answer to this question, like just about any question in law, depends on where you live. Approximately fifteen states have laws that state how old a puppy must be before it is offered for sale or adopted out to an owner. Three additional states have administrative regulations that give a minimum age for puppy sales. Of those states with laws, thirteen require that a puppy be at least eight weeks old before being offered for sale. Of the remaining five states, two states (Pennsylvania and Virginia) mandate that a puppy be at least seven weeks old and one state (Nebraska) requires that a puppy reaches six weeks. Two states do not speak to a definitive age; rather, these two states (Illinois and Nevada) make it unlawful for to sell a puppy who has not been weaned from his or her mother.