After many days of pulling hair and teeth, my last Dumpy decided to finally eat. He's liking the crickets! I'm happy, but now I'm wondering, how the heck do I get him to stop eating?

He wants to keep going after five medium crickets, but I'm afraid of overfeeding him. He's just so small... well, not terribly small but still young. I accidentally murdered my Pac Man via prolapse so I'm very very very paranoid about my remaining guy. Am I feeding too much? Too little? Just right?