Strange pinkish, redish fur on belly of female squirrel.

[Mitzi]

Hi there! I've been making friends with a little female squirrel who likes to come drink from my bird bath every day. A few weeks ago, the fur on her belly started having this weird pinkish, redish tint to it. At first I thought maybe she was having an allergic reaction to the nuts I'd given her (I don't feed her a lot, but had given her a few nuts because I read that spring can be hard on squirrels since their food supplies are often used up by then). I'd given her some walnuts and almonds (in shell and brand new, so definitely no mold on them). But I stopped giving her any nuts and after several days, the tint was actually worse, not better.

Then I thought maybe it was due to her breastfeeding some babies, but I looked online and it said squirrel babies suckle for up to 10 weeks and it's now been past 10 weeks and she's still very pink on her tummy. Again, it's the fur that's pink, but it seems like her skin underneath is also maybe pink/red-ish, too. It's hard to tell because I can't get close enough to get a good look. I live in a mountain town in Colorado, so I don't think she's been getting into chemicals or anything like that, but who knows.

Anyway, I'm just wondering if anyone has seen this before or has any thoughts on what it could be. I'm attaching pictures, but again I can't get very close and she doesn't like to show her belly much, so getting a good shot was hard.

Thanks in advance for any input!