Well congrats to you & also good for you to rescue that little lady. We also live out in the country & roaming dogs are a big issue here as well. We had taken in a female that we thought was about 5 months old, a cross between a fox & a collie. Anyways she went into heat about 3 weeks after we took her in & even Samson (who is fixed) was acting weired. Every darn dog in a 10 mile radius was circling..It was comical in a way, but frustrating for me as every time I took her out on a leash I felt like I had to fight off the males!! You do not want to have to deal with that!! When we found a permanent home for her, the first thing I told the new owners was Get Her Fixed!!