From my own experiences and in my own opinion, I STRONGLY advise NOT using the canned food. My reasons are:
1. You cannot gutload the food.
2. They are very boring for your leo.
3. They loose many of the vital nutrients after they have died, I do not have proof but I have been told by many people.
4. Unless you freeze them, one can should only be kept for 3-4 days (I have had them mould that fast). When I first started them, I e-mailed the distributor about them going moldy so fast. Their response was, “would you eat a can of tuna if it had been in the fridge that long?” (I swear to God).
5. They are very expensive, well at least I paid $10 a can.
6. Your one little baby leo will never eat them before they go bad.
7. When I froze them they always became freezer burned.
8. I started to keep them on hand in case I ran out of live food, I became lazy and used them as a staple diet.
9. My leo became so used to them he stopped eating live food.
10. My leo, EXTREMELY slowly, stopped eating.
It's your own choice, this is just my personal experience. I believe feeding the canned crickets was my biggest mistake, if there was anything I could have done different with Rex (RIP), that would be it. I would recommend using sand before I would recommend using canned food.
Lisa
-----
0.1 Hypo Leopard Gecko
0.1 Albino Leopard Gecko
0.1 Blizzard Leopard Gecko
1.0 Pacman Frog (Phatty)
1.0 Lovebird (Tony Montana)
1.0 Elkhound (Otto)
0.1 Malamute (Paris)
5.0 Bettas