My mare has an enlarged pastern in her off-fore. It's been like this for some time: there's no heat or puffiness, it just looks bigger from behind. The hollow above the heel bulbs isn't there. She shows no pain on pressing the area, but recently I noticed a hard lump in the centre back of the pastern, quite small, but noticeable to the touch.
She is variably lame in that leg, and typically stands with her pastern upright and her heel slightly raised. Turning is obviously especially painful to her.
A bit of history about her: when I got her this summer she had very overgrown hooves with contracted heels and tiny frogs, and she was slightly unsound in the same foot. She has been barefoot for four months and has improved greatly with regular trimming to shorten her toes and eliminate the side wall flare. She foaled in late September and two weeks ago I had her shod; about the same time I noticed the bony lump in her pastern (nothing to do with the shoeing).
At first I put her unsoundness down to navicular syndrome, what with her contracted heels, and hoped that being barefoot would cure her, but that bony lump has me wondering about high articular ringbone....
The vet's coming to see her and do xrays, but I would be very appreciative of any ideas or input, at least so I can ask him the right questions