Hey everyone!

My snakes previous owner said that Pua ate frozen weaned rats. I wasn't sure what "weaned" meant and I thought that meant "small", so I got small frozen rats. Now, I realize that there is either weaned OR small. I've did some measuring, the rats are about the same size as his thickest end, maybe a tiny minuscule bit bigger, but it's about the same size. But is weaned to frozen a huge size gap? Will it hurt him?