At a 4th of July part we had some helium leftover from the balloons for the kids,so we filled a trash bag with the helium,attached a m80 and a cigarette to the string and let it go.that was pretty cool to watch after it drifted for about 5 min. then explode.
If that was in my back yard he/she would be getting that lead sleeping pill. I have 4 miniature dachshunds (one with mega esophagus and weighs about 5 lbs.), and 1 Yorkie (rescue dog).
I have to watch for hawks never mind coyotes.