He arrived yesterday and was very stressed out, he did not eat anything. Well today after 5 attempts, he ate 6 crickets. He then pooped after I soaked him tonight. But he is very very skinny. Literally the size of a pencil. He is so tiny I don't know what to do should I let him sleep throughout the night, or do I need to do something ASAP tonight. I'm really scared
Take it slow, you do not want to over feed if he has not been eating right. Better to do small feeds of 2 or 3 crickets 3 or 4 times a day. His appetite will increase after the shipping shock.
Does his poo look healthy? He could have a parasite if it doesn't, but chances are he doesn't, but he could, if it looks fine, not loose or abnormal looking, then your best bet is probably just follow what the poster above me said
He should be fine, keep him hydrated and feed often. How is his activity level? I would be rather upset to have a baby that small shipped to me, do you know his age? Did you see a picture before he was sent? It also looks like he might have been on colored sand so make sure he is pooping regular.