Hi there. One of my 2 year old RIRs has been a little bit off lately, and today I noticed her back end was quite swollen and tight as if it were a water balloon. For the past couple weeks she's not been laying eggs even though she goes to sit in the nest every day. She's a bit on the smaller end and averages only about 4.5 lb, but today she weighed in at 5 lb 3 oz. Also tended to have pretty watery poops lately. Still generally acting normal otherwise: dust baths, scratching around the yard, coming running for treats, etc. What do the experts think might be causing this and what can/should I do about it? Thanks