The middle one just turned a year old. The other two turned one in the beginning of July. There is a huge difference but the pictures make them look a little bit bigger. I live in South Florida so I do not hibernate them. I don't think they have ever gone more than two days either not eating. They eat just about everything! The critters they eat I feed gut loaded formula and give them calcium as well. I started that very young. I also feed them aquatic turtle frozen blocks, and blood worms. They also started eating veggies and fruit early on as well. [SMILING FACE WITH HEART-SHAPED EYES][SMILING FACE WITH HEART-SHAPED EYES][TURTLE]