mscat
I hadn't even thought about the scenario of her burning off calories from just playing until you mentioned it. She is very hyper and plays a lot. We also take long walks almost every day. She seems to be fine other than she is hungry all the time. She has been putting on weight. Every time I take her to get weighed she is a little heavier. Yesterday I took her, and she lost almost 1 pound. I am very happy with that weight. We have been really trying and it paid off. I did pick up a bag of Canidae today. I gave her a few of them and of course she chomped them right down. I will gradually start to introduce this new food. I'm sure she will love it.
And I think you may be correct, she may just love to eat. I don't think she has parasites, but I'll keep that in mind. Thanks so much for your ideas.
P.S. I loved your quote.