We have a 1 yr old Black Australorp Hen. She seemed fine yesterday. Eating, foraging and layed an egg. Today she is just laying down and not moving much. Her comb is a little shrunk and lighter than normal. I'm not experienced but her crop feels the same as the other hens though her abdomen/back end seems a little softer. Vent looks the same as others. She feels a bit lighter but not super skinny. When I hold her and kinda feel around her abdomen area when I set her down she had explosive watery poops twice and the third time it was less. See pics below. And she is doing a slight opening of her mouth periodically which I have a video of. I cannot visually see anything with my inexperienced eyes. Anything else I should be checking for? Is comparing her to the other black australorp or Isa brown not a good indicator of anything? Thanks for any suggestions you may have.
Edit to add a pic of her stance
https://youtube.com/shorts/I4z9hsXMKLM
Edit to add a pic of her stance
https://youtube.com/shorts/I4z9hsXMKLM