Cold Weather Feeding female 2.5 years old

My Peach got a little pudgy and wasn't as interested in feeding as usual. So I tried to let her go two weeks before feeding. She eats 1 frozen/thawed rat that is 90/150g. She just acts like she's not hungry. I will refreeze once. So now I've thrown out three rats. She hasn't eaten in like 5 weeks. She did have a very small poop a week ago, and the pee part looked very dry. Almost powdery. She is still chonky (not fat) just thicc. So I know she's not starving. I use a plastic bin with a towel in it to feed her so she knows when it's dinnertime. I just don't want to keep throwing away her food. Is there something that will let me know when she's finally hungry again? I check on her every day and get her out every few days. I took her to the store recently and she was active and alert and her usual sweet self. I had a mask, she didn't. Any advice from you pros? Thank you so much!

Wendy