Live in places where many things spawn. Surround yourself (with your Sabertooth) with spike walls then go harvest the corpses. Or just have plant x species surrounding your base even on the beach then there you have it. Use sabers for better results.
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