I think at least one kind of predator would be important to have. Without one, such as the fox, this wouldn't really have anything violent involved, and everyone knows we need violence.
But not everyone wants predators, and not everyone who wants predators wants chickens.
Would it not make more sense to have predators in their own pack?
If it is not a farm animal, do not put it in the farm animal pack
More animal packs can be made, such as a woodland creature pack, which would have the fox, and maybe bears and wolves.
Then other packs that have tigers, lions, hippos, elephants, etc.