About 2 (give or take) years ago Soda showed up with a white spot right in his girth region. It's about the size of a half dollar and was not the result of any injury.
This is the girth spot. Since it has appeared it has not changed size or disappeared. I circled it on the pic because he is so light in that area it is hard to see. Around the same time a small (about pencil eraser sized) spot appeared on his butt. It has stayed too.

Now in the last month he's shown up with 8-10 new small white spots. They're all about the size of a pencil eraser. I know the pics aren't the best (he is really dusty right now and the light was terrible), but here are some examples:




There are others, but the pics didn't turn out at all.
Any idea what could cause this? I thought maybe scars from bug bites, but none of these are where he got a noticeable bite.. It's not a big deal.. But as I said I can't ride him right now and I'm curious... So I find myself doing things like this.
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