You can't make your dog mate. Your dog chooses who she/he wants to mate with. For example: My aunt tried to get her dog and my dog mate. It didn't work out because the dogs avoided eachother and didn't quite get along. My point is YOU CAN'T "MAKE" YOUR DOG MATE.
Their correct name is Miniature Pinscher. The Doberman is a newer breed than the Min Pin. They are not even related. To answer you question, yes. Any dog can mate with any dog. A Saint Bernard can mate with a Chihuahua.
In most cases, the way you know if your dog mated and got locked together if the dog cannot remove itself from its mate. When dogs mate, it is quite common for dogs to get stuck together due to position and how the dog penetrates its mate.
I think the male has to come along at the time she is ready to mate, and it does not matter if the dog is older, younger, or related. Dogs have a natural instinct to mate. Dolphins are the only mammal other than humans to mate for fun!!