Hi, I went out to my chickens and I noticed one just standing in the corner. I took her out of the corner and put her in front of my chickens water bowl and I took my hand off of her. After I did so so fell over frontwards onto her face. I helped her up. I also noticed she does not have good balance she kind of is like dizzyish. I picked her up and when I pick up chickens I put a little pressure on there crop and hold around them for support but when I picked her up she threw up clear liquid. She also did this when I was about to pick her up and put little pressure on her crop. Her crop is like a almost full water ballon and the liquids she threw up had a sort of fowl smell to it. Also her stumic area is sort of hard but I felt like 5 of my other chickens bellyareas and they where almost as hard like usual since I give them free acses to food 24/7. Im wondering if this could be sour crop or impacted gizzard but I think it's sour crop. What do you think it is that she has? And any recremendations or helping supjestions? Help would definitely be apresiatied a lot!!!! Thanks for reading! Also: how can I treat her for what ever she has?