Your welcome! Yeah they grow very quickly. You can keep them in a cooler area like your garage and this will help slow it down as opposed to keeping them in your house where it is much warmer. They are great for hydration. I feed 1 at each of my feedings which is fine to do as long as your feeding other items. Rainbows smallest batch is 12 which may work out for you if you are on every day feedings. My guy has transitioned to every other day so I always end up with monster sized leftovers lol. They come with their food so you don't feed anything extra. You do need to empty the poop each day. I keep food up and the lid down so the poop does not sit on their food. You don't want to try to feed them off all at once or your cham is going to have extreme diarrhea lol. I put in a pic so you know what to expect this guy actually doubled in size from this pic.
Another thing that is important and you may already know this is the size of feeders. The rule of thumb is to feed insects no wider than the width of your chameleon's head in order to prevent choking. length is fine. It is the width you are looking at.

So I actually just answered this same question about gutloading separately in another thread so take a look at this thread
https://www.chameleonforums.com/thr...housing-and-maintenance-vs-gutloading.168697/
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