My welsh harlequin is 6 months old. Do you see the bulge in her belly? Any ideas what it might be? Surely not an egg? Shes acting fine. Other than the boys being boys to her in the water.
Could just be an egg pouch. It’s appears when they’re about to lay / when they’ve been laying for a little while. My ducks have more subtle pouches, but my African goose got a very noticeable pouch after just a week or two of laying.
If she’s acting normal, pooping, and the mass doesn’t feel hard, I’d say she’s okay.