That sounds odd, how big is the frog? If you've had the frog 2 years it should be full size already. Aestivation/hibernation is very risky, I wouldn't recommend trying it. You could lose your frog. I feel like its especially risky if your frog hasnt grown properly. These frogs are supposed to range in the 3-5 inch range.(around 7-13cm)
Some pictures would also be very helpful.