Kill some Trikesthey are easy to kill
Go to the surface entrances on aberration with a minig drill and harvest the bones
Harvest a dead whale on a beach with your pickaxe. Tons of keratin, oil and rotten meat to make narcotics.
Carbonemys will drop a decent amount of these you an find them in swaps commonly
to get keratin you must sacrifice the turtles
A tip to get a lot of keratin early game is to go around with a crossbow and kill Carbonemys. They give between 5-20 keratin a piece and are very easy to kill.
If you're playing with a friend, effiecent way to get a lot of keratin is to get an argentavis and pick up your friend on a sabertooth, fly along a beach and drop him onto any turtle you see.
lol we will miss them
On aberation if you need a large
amount of chitin/keratin use a pick or preferably
An ankylossaurus on those old bones near the surface cave but watch out nameless spawn in there and it may be very hot.
Mining drill on bones in abb surface entrances