People report MPC taking orders, but shipping was from Meyers in a Meyers box. ????? MPC isn't the only "order taker and drop shipper" company either, it's just that like Meyers themselves, they'll take small orders. Of course, the buyer pays a super high premium for the convenience. The cost per chick is pretty stiff, as I recall.
As for Mt Healthy and salmonella, ALL hatcheries battle this. The most recent outbreak was in Missouri and the hatchery there, (name escapes me). Estes, maybe?? BTW, salmonella is part of nature, it's pretty much everywhere and on almost everything. Like e-coli.
A hatchery that recently had an outbreak, gets all government inspected and sanitized and scrubbed is likely a pretty good source for chicks, frankly. Folks who have chicks need to remember to not allow kids to handle chicks and then suck their fingers or rub their eyes. Wash your hands.