Fantastic work - even though it seemed to mirror the first part a little towards the end, the further detail on what really happened there is excellent.
I have one other little critique, but I think it's a slight spoiler, so you'll have to highlight this next paragraph:
The only other thing about it was that it's not apparent that she's turning into a fox at the end, as the basic transformation is a lot like her initial cat transformation. Nonetheless, it's still very enjoyable. 
One last thing - I'd love to have seen a pin-up style pic of Sam and Daisy in mid-TF, like in the last part (and more of Cowgirl Daisy in general...)