Raising this first batch has been a journey and huge learning experience. I am in week 6, with weights not fully up to 4lbs yet (slow start). I had 1/2 of my flock wiped out by a dog attack last week. When I butchered the salvageable birds from the attack, I noticed that the gizzards had little to no grit. I ASSUMED (again, a rookie) that being on pasture/grass would allow them to peck and get sufficient grit. Now, seeing the contents of the gizzard, have concluded that they DO NOT HAVE SUFFICIENT Grit. I need to add grit to their feed. COULD this be the main reason of my sluggish growth rate = slower processing of grains?