Female dog in heat

Question
My question is that I have two male miniature dachshunds and a 7 month old female.  She's just coming out of her first heat and my boys went nuts.  If we want to breed her with one of them, do we have to keep the other one away?  If the other one gets her will she have puppies from both?

Answer
Hello, she must be on her Third cycle before shes bred by this age she will be fully grown and able to carry a pregnancy. The males will fight over her if there allowed near her the same time...its possible there might be puppies from both you'd have to email an experianced breeder in the area and ask to be sure I have heard something of this before however.