Being as the sire was a leopard appaloosa, and not a “few spot” or “snow cap” (blanket w/out spots) means he carried one copy of the LP gene (rather than homozygous like these two colors). Therefore it is quite possible that he did not pass along the genes needed for color.
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While it’s not uncommon for horses with lp to “color up” later, they are usually born with other characteristics, like mottling, white sclera around the eye, and stripped hooves. Nothing in the photo looks indicative of lp, to me. He looks like a seal brown, but may not end up as dark as his foal shed appears.[/QUOTE]
I agree with the above. With no “characteristics” (sclera, stripped hooves etc) - the odds of color developing are very slim.
To get appy color, you need the LP gene (this will give you the characteristics), and perhaps roaning. For spots, you also need one of the PATN genes for a coat color to express.
While I agree - they can change color a bunch (my current horse went from THIS to THIS in the matter of 3 years) - but I would say it is pretty uncommon for a horse displaying zero characteristics to develop color.
This is a fun color calculator! You will see if you take a black base - and add LP you get a roan. Add one copy of PATN1 - you get a leopard. One copy of PATN2 - a blanket appy.
So while yours could possibly roan a bit, get some “frost” I doubt he would develop spots.
He is CUTE though, and honestly, I LOVE that type of color. Mealy dark browns or bays look so lovely when they shine up (my mealy brown TB got the BEST dapples). While I love my girl’s spots, its so hard to get (or show off) a shine on her coat.