Have you tried using gerbil bedding to season a mouse or rat first? Leaving a F/T in the hide over night or putting her in a large paper bag with one?

I had a 1200 gram albino that hadn't eaten for me for 6 months. I was really trying to keep her off of ASFs and finally got her to eat a mouse. I don't know that I would give in at 2.5 months just yet if it's hard for you to get ASFs. If that's the route you want to take, though, I would look online. I have found a site or two where you can buy them frozen.

Scales are cheap in the kitchen section at wal mart. I might be a good investment so you can keep up with her weight.