She does have quite a full looking abdomen.
How is she acting - is she lethargic, having difficulty walking, shortness of breath, etc.
I agree with @Eggcessive about reproductive problems. If the abdomen feels fluid filled, sometimes you can drain that and give them some relief. I would only drain if they are having difficulties or are declining. Some reproductive issues there is no fluid only solid or coagulated matter is in there, so you will want to have a good idea if it feels like fluid.
Antibiotics may also help along with draining to fight infection and inflammation - again, it really depends on what's going on in there. Sadly, symptoms of most of these conditions look very similar and you don't know the "name" until a necropsy is performed when the hen dies.
How is she acting - is she lethargic, having difficulty walking, shortness of breath, etc.
I agree with @Eggcessive about reproductive problems. If the abdomen feels fluid filled, sometimes you can drain that and give them some relief. I would only drain if they are having difficulties or are declining. Some reproductive issues there is no fluid only solid or coagulated matter is in there, so you will want to have a good idea if it feels like fluid.
Antibiotics may also help along with draining to fight infection and inflammation - again, it really depends on what's going on in there. Sadly, symptoms of most of these conditions look very similar and you don't know the "name" until a necropsy is performed when the hen dies.