I have the cocker spaniel couple and I will like to be a grandma and sell the pups in the future, but I have no idea how to do it. So my first questions is: How old should the female be to have the first litter? If she gets pregnant on her first heat, would the puppies be healthy? How can I keep the dogs separated so they wont do the deed? Their inside dogs so I cannot and I wont keep one inside and the other outside, specially in a 118 weather.