Make your dinos (decently high leveled) kill them or just kill them and harvest keratin. Easiest way to get Kertain/chitin if you're a beginner. They're slow so you can out walk them whe shooting them in the head with stone arrows.
As a beginner I tamed several of these. I am now level 80 and I still have most of them. I use them mainly for base defense and storage. If you have a feeding trough nearby you basically have a living chest.these have great health and female's will give eggs for food.