I have a 3 week old chick that has had a hard impacted crop about the size of a marble for 4 days. I did not realize when I got her that there was an issue because I am new at this. I noticed the crop looked slightly bigger than the other chicks but she has been eating, drinking, and active. She also had pasty butt which i gently cleaned. Now she seems slightly more calm than the other 2 chicks but I wonder if that's lethargy or just temperament. Now that I know what a crop is I checked her vs the other and her is distinctly hard and the others are squishy and less pronounced. Any tips? I've read olive oil, ACV, yogurt massage, water only...I have hydro-powder I could mix. Should I iso9late her from the others to watch her bm's and eating more closely? Won't that be stressful for her? Please help