User blog comment:Gyrendolen/Does anybody know where the fossil.cfg file is?/@comment-25235219-20151029004035

Go to roaming and go to the .minecraft folder.

Go to the config folder.

Open the "fossil" file with notepad.

Change Allow_Dinosaur_Breeding=true to Allow_Dinosaur_Breeding=false

Don't touch anything else unless you want to disable more stuff.

There you go.