What, Chul, is so WRONG with being careful with a bitch in season?
When I have my female, when she is in season she will NOT be outside unattended, ever. Most likely not even without a leash. If my male is still intact, one or the other will be crated at all timeswhile she is in season. Not just kept in a separate room, but crated. I've seen too many mistakes happen when people just put dogs in separate rooms and then say "oops, somehow the door got open . . . " to excuse their dogs tied in the living room.
Being careful and responsible with a bitch in season is 100% necessary. If you can't do it, spay your bitch. Dogs do not understand that it's wrong to escape from their yard to seek out a mate (bitches do it too, btw, not just dogs) That's something that people need to control.
The reason the bitch needs to be watched with such zeal is because SHE is the one that can bear the puppies. Granted, you can't have puppies without a male, but keeping the female under tight control for maybe a month out of the year is much easier than keeping a male under the same tight control for 365 days. Not that males shouldn't be carefully watched as well, but if you have a bitch in heat, DON'T LET HER IN THE YARD UNATTENDED! It's just freaking common sense.
I hope you don't have intact animals.