3. BARNYARD MASTURBATOR and 7. FISTULA FEEDER
None of those I find especially bad. The fistula sheep we've worked with were quite nice and feeling the heartbeat though the wall of the rumen or having your hand inside the sheep while the stomach's contracting is an unique feeling,
And I don't know about the 'manual manipulation' on the second job, we've so far mostly tried to get the bull 'in the mood' by rubbing the accessory sexual glands, but in the end used the AV - you've got to catch the sperm somehow, how do they do it by hand?.