As I was working outside today I noticed my hen just floating in her pool. Which isn’t normal for her. I went over to check her out and she was sinking in the water. Not floating on top but almost completely submerged. Just the top of her back and neck were above water. So I grabbed her and set her in the ground and she can’t stand. She’s just laying on the ground teetering back and forth. Anytime she tries to stand she just flops forward. She seems to be molting as there’s feathers all over but no blood or any wounds I can see. She is older too. At least 4. What’s going on with her?