For some reason the TR on Hughes 500s seemed to anger dogs. Probably the noise signature.
On another note cows are really funny. I was doing an inertial nav mapping survey which calls for a landing every 3-4 minutes. We often landed at the same spot 4 times during the day. First landing cows lumber away, Second landing cows stand around looking at the machine, Third landing cows lumber towards the helicopter. Forth landing cows start stampeding towards you. One of our pilots had the happy experience of a young bull goring the machine..left a hole in the skin of the machine.
Caribou are very curious and sometimes wander up to the helicopter after you shut down to wait for the geologist to commune with the local rocks. For fun, put down your book, turn on battery and hit the starter..Caribou does a vertical departure with a pedal turn and departs over the horizon.
Musk oxen will sometimes come for a look but don’t approach too closely.
A barren lands grizzly bear can and has reduced a helicopter to its component parts in a minute. Do not annoy them. A young pilot and a rock doctor spent 15 minutes chasing one once and headed back to camp. Mr bear takes a bearing and sets off across country. That night there was a loud noise from the heliport where 3 identically painted machines were parked. The bear beat up the machine that had buzzed him and departed over the hill. He did not enter the camp area nor touch the other machines..apparently the beasts can read registrations.