Glad you got everything changed out. You should post a pic for us. Is the cage screen? If so, you can let the crickets out on the bottom and they will crawl up the screen towards the light and he should be able to pick them off.You have to have some branches and vines that are near the sides though so it will make it easy for him to hunt. 16 X 16 X 20 is not that big. He should not have a problem. That cage will not last him too long now. An adult panter or veild should be in a cage of about 24 X 24 X 48. I have my panther in a 36 X 30 X18 and that is a decent size also. If you to talk just to me, just click on my name, then it will say send a private message. Just click on that and you will be able to type a message. If you find him not being able to get the crickets, then you can set up a cup feed for him..