Changing colors?

My mare recently has been changing colors and getting super dark. Now instead of a plain jane chestnut she looks like a liver chestnut. She has a teeny coat starting to grow but I feel like she just changed all of a sudden, and when I got her back in March she still had a HEAVY winter coat which was nothing like the color she is now.

First picture is taken in March (when I first got her & after a bath)
Second is a few weeks ago
Third at a show last week
Fourth was taken today after our lesson (which is why she looks so sweaty)

Health and diet has a LOT to do with how a colour will express on a horse. So when horses change owners, it is common for them to change colour to a lesser or greater degree also.

Well the first picture she was in bad shape. But nothing has changed drastically recently so I'm not sure as to why her color is getting so dark.
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That will be seasonal change. What I meant was that you didn't see this season's true coat last year as she was not in tiptop shape, but you will this year as she is.

I agree with Chiilaa.

Some horses also just change quite a bit over the year. Mine changes noticeably over the year, for example: Seasonal Color Change Right now she's dappling, which she only does in the fall and winter. No diet or living arrangement change, just how she is.

Thanks poseidon! I figured it was a seasonal thing just didn't know if there was a real problem with her getting so dark so quick.
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I have a liver chestnut here that is doing the same thing. She's starting to get darker.

My brown mare that was super sunbleached, is now getting darker too.

Wow that's a really dramatic change!!! Pretty though :)

Totally different horse! She looks fantastic now. :)
Looks like a real sweetheart too!

I'm so curious though. What happened to her?

She's probably just receiving better nutrition now. :)