Is this blood?

[Nat]

I've been away for 2 nights and my mum has been feeding Dolly.
I came back today and cleaned her cage out to find these (what I think) specks of blood. It's in the place where she likes to sit and clean herself. It looks like maybe it was her foot given how dotted around they are.
I checked her feet before and all 4 look fine so I'm abit puzzled.



I'm more worried as to what she may have hurt herself on, pretty much everything in her cage is wooden and I've checked them all and none have any obvious sharp bits on them.
Do you think it IS blood??
(I think the lighter red patch is the remains of some pepper I gave her).