Noticed a week or so ago that my gelding had two pea sized bumps just below his throatlatch. Found/felt them when grooming - they are not really visible. Thought at first they might be remnants of halter tag.

Then on Sunday, I noticed/felt another pea sized bump on his back. The lumps are hard and don't seem to bother him at all.

His fecals have been negative for months, although I did worm him with EquiMax last month (for those nasties that don't show up in fecals).

I am pretty anal about grooming, cleaning brushes, saddle pads, etc.

Any ideas?