Looks like ovulation to me..or at least she has that tail suck ball pythons tend to get in ovulation and she really does look huge compared to the male (both the snake and male arm in the last picture LOL)

Oh and Slacker, I noticed way back near the bottom of this page you were asking whether rats are more nutritious than small rabbits...maybe this chart may help you figure that out.

www.rodentpro.com/qpage_articles_03.asp

What I can figure out it looks like rabbits have more protein and fat level but don't seem to have as good a calcium/phosphorus ratio...(though not sure if this is as important with snakes as it is with lizards).

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PHLdyPayne