Not warriors! (not sure they're even cats) Skills cannot be changed once added! You need about three food points for each member of your tribe. At the start, Meat gives 2-3 points, and plants give 1-2 points. The max amount you can currently have is 8 members. Having more than one member with a firestarting trait is not actually that helpful. Medicinal Plants do not currently have any use.
To Add: Upgrading tribe structures? Attacking other tribes?