My Gold Laced Wyandotte, Ginger, is about 5 weeks old. Ive just started giving her and her 2 sisters treats (grapes, apples, bananas, oats) in the last couple of days and tonight, after I had just finished cleaning the brooder (just an old lizard tank that Ive used as a brooder in the past), I picked her up and noticed a large, almost golfball-sized lump in her breast area that was definitely more on the right side than the left. It was soft to the touch and I couldnt seem to find any pustules on it when I inspected. She didnt flinch as I felt it and she is acting like she always acts. Could this be her crop and is it too early to give my chicks grit? Theyre still on starter feed.