I will be starting my first hive in a few months and have a concern. We live on just under 2 acres with horses pastured immediately behind us(west lot line) and cows pastured immediately beside us(south lot line) (niether of which are ours). How concerned do I need to be about this situation? I read somewhere recently that they could attack livestock? I actually plan on putting them on the south side of a tree line that marks the north side of our property...approximately half way between east and west lot lines? All input is appreciated!