Which brand of fly spray and dewormer?

Question

Which brands do you use and would be best for a pasture horse?

Answer 1

i use pyranha one month then the other month i switch to happy horse i find if i use the same fly spray over and over again they start to get immune so i swap out same with wormer the best thing is to get them on a rotating schedule of wormer or the same thing happens to your horses body it will get use to it and it wont work as well