I had thought that the ferrets which would gain most weight in preparation would be the ones who exercised the least. In our case meaning Carmen.

But on the contrary, those who gain weight are those who like to take long walks.

I didn't understand why, until today, when I took out Carmen for an extra long walk, and upon returning, she started eating the pork I had put out for them all. Usually, Carmen only takes one piece of it and doesn't want the rest, but instead prefers the cat food.

Presumably, this means she eats just what she needs and not more or less.