Quote Originally Posted by SaveThePoundDogs
but how do I know exactly WHEN to stop LOL???

I'd say it's time to stop when:

1) you no longer have proper room for the dogs to play or be separated when necessary

2) you don't have the time to properly play with them, excersize them, groom them or pick up the poop in the yard

3) you can't afford the routine annual vet visits and medications they need plus a bit extra for emergencies

If you've got all of those things covered then you probably don't need to worry.