Originally Posted by erikaharmony
There are some weird things that happen sometimes! I saw a stallion in a ad for breeding. He is pure thoroughbred but he is painted. His parents were both solid colours. So I guess anything can be possible but extremely rare.
If the resulting foal was "painted", then at least one of the parents was also carrying a pattern gene. It is impossible for a gene to skip generations or just pop up randomly. However, many times you will see a case where a pattern gene will show up loudly in a foal even though the owners weren't aware that the parents were carrying it, because it had expressed itself so minimally for several generations.
And to the person who was asking before, the silver gene does not exist in Thoroughbreds. Most likely, both of the parents were Ee & the foal inherited ee, making her a chestnut.