Before we call the vet out...any advice on what may be causing the swelling (see photo); we weaned our OSB sow last weekend and as her milk dried she was left with this swelling.
It is not particularly sore (as she will left me squeeze it without reaction); it appears to be fluid (no solid lumps) and she is not bothered by it (all other signs are normal)...what do others think before I call the vet?