Get a sabertooth or a dire wolf and kill stuff, they are easy to tame and provide hide forever
Harvest creatures with a chainsaw and you will get loads of this stuff
Giganotosaurus can gather 28 hide from 1 terror bird, while sabertooth can gather 43 hide from 1 terror bird, also explorer notes says it's the best tame for gathering hide. Sabertooth deserves more stars than giga
The Therizino’s bite attack gives you only hide, no meat.
Tame a breeding pair of sheep, imprint and let sit in cryo for a few days, throw out dump all points into health then slaughter and harvest with chainsaw endless hide.
The C-Attack from the Therizino gives you only hide no meat. And it gives you a lot hide...
If you have pack of high level direwolves...you can let them enable wandering and set them into aggressive...almost like you have a automatic hide farm
In primitive plus you can make a stone knife that gives a lot more hide than any thing else
If you live on herbivore island wall of cove wolf or saner wander and argressing endless hide
Tame a male ovis, tame a lot of female ovis. Breed them up pump health kill ovis with giga and harvest or kill them and harvest with chainsaw.