Hi, I need to give my horse dewormer by Dec 15. I gave her dewormer about 5 weeks ago (so 7 weeks by the 15th) but I don't remember exactly what brand/type I gave her. What is a good kind to give at this time of year? Will go buy some tomorrow but just wanted to know people opinions before I go. The reason I need to give it to her then is because I am bringing her back to the barn I board at and they like it if we deworm them 2 weeks in advance.