1) squeeze stone stiles
I was told by a Gloucestershire local they were called "pinch bellies"
Subsequently I hear that in Lancs they are called "Fat Men" & Yorks "Fat Ladies" (or vice versa - discuss)
And I see the term "slip stiles" elsewhere

2) animal stiles
I think Yorkshire (but oop thayer generally) a suitable hole in the wall can be called a "sheep creep" eg link

3) coffen stile
In Cornwall they have a lot of stiles resembling a cattle grid made with stone. The term "coffen" is kernak for "hole". They can have a raised middle stone, but the feature was the void under to confuse cattle.

4) Any dialect suggestions for stile styles ?
TIA

BTW http://stiles.mister.red is a growing interactive map of stone stiles in GB. New images welcome.