Have 10-yr buff Orpington with water belly getting worse, upon closer inspection she has blocked crop almost size of tennis ball. Did not notice since she’s so fluffy. We read about using oil and and massage to dissolve and move through, but don’t know if water belly means she’s having gastro problem, and they are related. Since she’s so old realize the latter could be tumor or infection. She hasn’t laid in few years, so guessing it’s not ova related. She is pulsating when she sits, I think from belly pressure. It’s is full to max now. Any help appreciated.