Well our guinea pigs have lots of tender points, that make them squeak when pressed....
Well actually, so tender we don't even need to press them, just stroke them in the wrong moment...
Talk about "allodynia"!
We used to have about 20 (only need one boy to get into the girls cage) and every time we mowed, we had to bring them inside, as the sheltie would cry and fret . Wheep every time they saw/heard anyone, buried in grass but still wanted carrots or such. Or just a pat