7 month old staff needs good home!

I have a 7 month old staff, female, brindle, house trained, good with kids, called ruby, we are desperate to find her a good home to go to as we have another staff 3 1/2 years old never had a problem before but shes now come in season and started fighting with my other dog we are currently keeping them completly seprate as every time they see each other they start, so she would have to go to someone who had no other dogs. need her gone asap as i cant sit back and watch this happen!