My 5 mo old hen, Bee, just started laying eggs this week. I noticed that her egg shells aren't as hard as that of her older "aunties" and I've been supplementing her food with Hi-Cal grit by Kaytee. Tonight I saw her do a poo that was rather hard and had bits of the grit in it. Later on, she strained to make a bowel movement. I know that excess calcium can cause constipation, but will she be at risk for soft-shelled eggs if I just put basic oyster shell/charcoal grit in her food instead? I only give the Hi-Cal grit to my budgie hens when they're in the mood to brood. I've had several of them have complications with egg binding in the past, and the Hi-Cal grit has basically eliminated that problem. I add a sprinkle of it to my older BQ's food each day, and none of them have had issues with soft eggs or constipation.