Phoebe, our 8 year old formerly feral pigeon who had reproductive problems and injuries and internal xanthomatosis, seems healthy and happy. However, her poop has become light green and kind of wet and loose. Will try to post a photo tonight when my significant other returns with the camera phone. She is on isoxuprine for heart problems. She eats well (mostly the green pellets, Zupreem cockatiel, prescribed by the vet). Am worried though because of the green color of her poop. Before, it looked more normal. She kind of leaves a wet ring on the paper too around her poop. Does this sound like a serious problem? Thanks.