Originally Posted by carol

think i heard right its where the cord used to go in to feed the babies while in the mum, and after they are born some times the hole doesnt close right when the cord is cut away or when it drops off and it leaves a small hole, so the lump is formed
it is very easy to mend, just a few stitches inside to close thehole then a few out side to close that hole they have to make.
it will not be any bother to the animal while your waiting to have this done.