Auction mare with udder

We had picked up a mare about month or less ago from the auction. I obviously have no history on her. She ran through the sale as a 12 year old, looked up her tattoo and she is 22.
First thing I noticed is that she does have a bit of an udder. I just assumed that she had recently weaned off a foal. She is on the thin side. I may just be imagining it, but to me her udder seemed larger... and she does have milk. I have never have a broodmare, only brood goats lol, so I can't really make any comparisons to a mare that has weaned off a foal.... and it just seems late in the year to have recently weaned and still be in milk... but I suppose she could have had a late foal??
She's put on some weight, but that's not indication enough for me to believe its foal weight and not just from actually being fed well.
We have the vet check her when we got her home, but not a pregnancy check....
Thoughts?

The foal may not have been weaned until the auction. As long as the foal sucks or if you milk her she will still produce milk. It will take time for her to dry up.
Do you have pictures ?

I don't. I tried to get some right after I posted but my camera freaks her out and she ran off. Its her teats that are more bulbous, her actual udder is not very large.

Are you able to feel for heat in her udder? I would keep an eye on it and watch for any changes.

I was able to get some pictures this morning. So what do you think... the start of an udder? Or her drying up an udder?

That's really hard to say. I'm no pro when it comes to broodmares. My mares bag looks similar to that. And her one and only foal is almost 3 years old. You can still get clear secretion from her. Best bet is to get a vet check on her. That would be my recommendation, especially since you are unsure.

Also, if she is freshly weaned, I would think her bag would be a LOT fuller.

We weaned two 8 weeks ago. Maybe 9 by now. I have one mare that looked like that the week after the baby was removed. The other still looks like she is nursing - much fuller and heavier. Can't tell anything by those pics. Have the vet out.