I'm liking 39 the best so far, but there's something about the rat that's not quite right. Maybe too literal or "rat-like." I'll have to think about it, but I kind of like the more "stylized" rat in #44, though it could also be interpreted as a wolf or something. Maybe more of a 2-D look or maybe sort of a human-like arm. This is probably not very helpful. I'll think about it some more.
I definitely like 52 and 51 the best. I showed them to an embroiderer who thinks it may be tough to embroider the detail. Not sure that can be fixed and still have this look?