Can someone please add animal options to the api documentation? Sorry I'm kind of new to this so could somone point me in the right direction if there is already?

What animal options? The only things we document here generally is hooks and methods provided by Oxide.

Speed and damage

That isn't something that is provided by Oxide.

ok this is off topic but where can i find stuff as (bold)

(hitInfo.PointStart, hitInfo.HitPositionWorld) : ProjectileDistance
{"MsgAttacker", "You killed <color=#ff686b>{0}</color> from {1}m in <color=#ff686b>{2}</color>."},
{"MsgVictim", "<color=#ff686b>{0}</color> killed you from {1}m with their {2} to <color=#ff686b>{3}</color>."},

I know hitinfo is in a hook but what about what follows it/ adds onto it?

(int)hitInfo.ProjectileDistance;

You'd have to decompile the DLLs from the game to get that or use an IDE such as visual studio.