It may seem laughable but like with humans,drugs can effect animals differently. Everybody doesn't relax and chill when high even on marijuana . Some become paranoid, mean and aggressive . If this happens with wild animals like the mule deer, mountain goat and even small animals like rabbits , they can turn that aggression on to humans and pets alike doing some real damage . Imagine a ***** being attacked in their own back yard by a wild animal that's also drugged out. It's a legitimate concern that should be taken into account.Maybe green houses would be more effective than open fields.