I got an 8 month old OG and the shop says he's a fussy eater. I have almost a whole week t figure this out, so tell me if you guys think these are good ideas, and if not, I'm all ears

1. They have him on frozen hoppers, so I'm going to try a heavily monitored live feed, hoping its just that simple
2. If it gets ridiculous, I've heard Guinea Pigs will work, as that's what they eat in Africa, but that sounds kind of unethical lol only because they're pets, almost like feeding it a dog. I know they're rodents but still, it sounded weird to me, any thoughts on this would be appreciated
3. I'm hoping the way I'm storing him might just make a difference. He was in a tank that seemed a little too small, with crickets all inside his tank from the other tanks around him at the store. He's acclimating to his new home seemingly well as expected, more room, clean, proper conditions with temp and humidity etc, and enough hides on its hot and cool sides.

I think a combo of 1 and 3 is a realistic game plan, and could be a solution to this "picky eater". What do you guys think?