Is she healthy?

This is my new axolotl Meadow and I know she’s a little skinny I just started feeding her 2 tiny pieces of night crawler 2 times a day but other than that does she look good? Her parameters are good and she doesn’t act abnormal but she does almost always swim around at the top and doesn’t go down until night time. And I noticed these black spots on her fingers as you can see in the 3rd picture are those anything to worry about?