Willow,
I read that they eat shrimp and small fish. Don't have shrimp because I think our fairy wrasse eats them too, and our fish aren't small enough for 4"-5" betta to eat.
i have crabs,
Cool! Not going to Calgary any time soon, but I wonder if someone in Calgary might be coming up here? Will help pay for gas for the person who brings the betta up to us

BTW, do you know how much the betta at Gold's is and if it's in good condition?