I've found they don't ship well too.
But when I do get healthy ones in, I always have a variety of foods ready.
IMO getting them eating is one of the more important steps.
I usually order a couple bottles of Tigger pods in advance.
I also keep on hand frozen mysis, and one of the frozen egg mixtures.
Nutramar ova used to be great, but it's not available much anymore.
I also keep ROE on hand.
I use a bare bottom quarantine tank with a dish of sand, a bunch of pvc fittings, a seeded air powered sponge filter, a small back filter and a small heater and powerhead.
Once they are eating 2-3 times a day and will come out to eat, ( after 2-3 days) I'll start adding copper.
I stretch that out over 4-5 days untill it's at least up to 2.0ppm.
I test with the Hanna High Range Copper Checker.
IMO, once you get them eating and fairly comfortable in the quarantine tank, ramping up the copper slowly, it goes pretty well.