I stocked a pound of FHM almost 2 weeks ago, now I have floaters. About 10 percent died due to shock the first go, water temp at 40. I did acclimate them the best I could. 2 weeks later and I have about 10 dead on the shore. Probably more.
Bait shops are a risky place to buy minnows. Sometimes they have held those minnows for weeks in tanks with less than optimal conditions. I bought minnows from Shelby last year with very good success hauling them for 1.5 hours; few if any morts. Ask him how long he has held them and how the mortality rate has been since he got them. I find him to be a honest fish farm manager.