Just feed lightly. Cb's dont have an off switch. My del would gorge itself and only last led a couple of yrs. If i had a cb del again i would feed no more than 3 times per week
My first del was super small (~2inch) and looked like a toothpick. It was not very food motivated or active. Eventually, it got eaten my my 8 inch moke. A few months later I got a larger one(~6 inch) and she is sooo cool. She torpedoes into the sand and loves to dig up my plants lol.