You've really captured a sense of movement here Delia. Aren't they beautiful creatures? To go into confessional mode, I've seen them only once, in Abernethy Forest on my last visit to Scotland, in 1983 :-( - that's awful, I know.
The picture isn't spoiled at all by a couple of toenails missing from the frame. As long as the squirrel itself still has them! All in all, well done!