Shes between 5-7 years, original owners were stupid & had no interest in caring for her so I can't give an exact birthday or age I got her in April I've had her for 7 months everywhere online said 14 days but I'm aware it's very easy to be misled with this information I only seek what's best for her as she's my first pet & a big commitment when I got her she had no bedding, dysfunctional UVB, heat lamp & a water bowl no bigger then my outstretched hand... Original owner fed frozen thawed but just threw the rat in a bowl of hot water changing the water frequently... I've heard to let rats thaw overnight in the fridge & warm with water then feed.. they also put her in a feeding tube, fed her & moved her back to the tank every feeding... I've bought tongs & have never moved her for feeding I lay paper towels in her cage where she's gonna grab the rat to minimize substrate.. I'm working on a larger tank with two hides at the moment as she's looking little squishy in there... Hardest part was finding large hides