What these animals all have in common are the following:
1) They are not native, but they are competing with native animals for scarce natural resources.
2) They all trample native natural resources that our native flora and fauna need to survive.
3) In areas where water bodies are nearby, or underground water sources are present as in the desert, their droppings contribute to fecal contamination.
I understand that horses, burros and cattle are a part of history. I would rather see our tax dollars protect native flora and fauna, instead of going to programs that involve non-native species.