In terms of how much you feed, a good way is to watch their body shape. By tracking that you can tell if your axie is getting overfed or underfed. By now it will eventually form a solid adult version body. If it's a girl, it's normal for the width of their body to exceed the width of their head (width not length and not height) a little since they have eggs in them. But for males, I kept my axie's width of his body to not exceed the width of his head. I hope it makes sense. But the width of the body thing is just my personal preference I've seen some people have axies that are fatter or skinnier, it's all based on how much they are fed too. Since yours is about 6 months old it hasn't fully become an adult yet so it would be healthy if it's head's width is larger than the width of it's body. At some point the size of their heads won't grow as fast as the size of their bodies.