How do you make your dog pregnant on Nintendogs best friends for the ds?

They can have puppies, because my female dog has bonded with my male dog on the 3DS. My females' physique has gone to overfed and I feed her like I feed the male, and he's not overfed. He is still plump. This is what you have to do:

.Buy a male and female dog (same breed. They can be a different colour)

.Put all your other pets in the hotel.

.Allow them to bond over a tennis ball.

.Feed them milk and dry food only.

.Leave them alone.

.JUST THROW the tennis, and don't play with any of them. Just let them bond.