One of my mice has diarrhea. I don't know why. The other two don't. I picked up the two to check but they pooped solid poop. The one is almost 2 months old. Could she still be feeding off her mom, and could that be why she has diarrhea? Or do you think she's sick? She's still really active cause her poo is all over her wheel and the other two aren't acting weird toward her. I changed their food today to see if that makes a difference. I need help!