My two year old crested Polish hen has some soft poo that is sticking to her bum feathers. The poo is pretty normal colored, sort of the color of their food, maybe a little darker. It's less formed (unlike the perfect little plops or spirals that my other birds make) when it falls to the ground and seems a little runny round the edges. The rest sticks to her bum and looks pretty gross. I didn't notice any bizarre smells, blood, foamyness, or worms at first glance. None of my other four hens have this problem or have had it recently. She's had runny poos for about four days. Any idea what might be causing the soft poo? It might just be a temporary thing, but I wanted to be sure. Thanks!