They (we have 2) were gifts to my children so I don't know the breeds (they're not the same) or age but we've had them for about 7-8 weeks. They have grown considerably and seemed healthy. About two weeks ago, the one in question was eating and moving very little. This past weekend, she began eating well and seemed to be acting normally. However today, she is barely moving. Not eating or drinking at all. Since both are in the same cage, I can't tell about the poop but there is definitely runny poop in the bedding. She has no energy and falls after just seconds when trying to stand/walk. Please help!