I've got a 25 year old. He was on medium f/t rats for the last 15 years or so. I'd feed him every 7 to 10 days. He rarely refused a meal. But about a year ago he started refusing much more often, so I bumped him down to small rats weekly, but now it's more like a small rat every 3 weeks or so. His weight is staying pretty consistent, around 2550 grams. No other real "symptoms", well one other. When he goes into shed I can tell it bugs him more than in years past. Otherwise he seems normal and healthy.
So basically, try not to worry too much if yours feeds less. As long as weight is more or less maintained and there's no other health concerns, just enjoy her. Good luck
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