Urgent feed question

[sho220]

Ok so I went to our new petco today to pick up some aspen and see if they got anything new in as far as snakes go. They opened in October and had a pinstripe from day two. Since than his size in girth has decreased dramatically. I talked with the companion animal "specialist" today and she stated he hasn't eaten in 26 days. I know they can go three months but for such a wee baby I'm worried about him. I talked to them about different feeding methods that they could try and the b12 method (last resort). I a, a relatively new snake owner but in such a small town even owning a snake makes you higher up in the pecking order (I don't agree with this so don't eat me, I'm still learning!). They offered to let me come in and try to feed the little guy myself. He is very docile and active. He seems stressed but is so skinny. I don't have the money to buy him, but the manager might be able to work out a foster program with me. For now I can go in and try to feed him.


He is a 13 pinstripe. Active and skinny. Not bitey. Not in shed.


Any methods I can try? Any suggestions from the real pros here? I want to help him so bad.
They feed f/t or diced. The employee was unaware of size but he seems like he could put down a small pup.

Thanks

I'm almost afraid to ask, but what is "diced"?