Ascites is when fluid collects in the belly from several possible problems, such as heart failure, liver disease, and sometimes in egg yolk peritonitis or internal laying. There are several threads about ascites and internal laying/egg yolk peritonitis on BYC if you do a search in the box at the top of this page. A vet may be of help, or you could try inserting a 20 gauge needle just under the skin in the belly to occasionally withdraw fluid to relieve pressure if that is her problem. I would recommend reading as much as you can before attempting this. Many of the conditions described can be more common in hens over 2 years old. Some symptoms can include loss of appetite, walking like a penguin or sitting a great deal, labored breathing, and sometimes, walking more upright .