They are being investigated for abuse, so I will never buy from them again
I would certainly like a reference for this allegation.
I am not affiliated with California Hatchery and did some research for a potential order. I found no accusations for a company called California Hatchery.
I did find articles stating that a California hatchery, named Cal-Cruz Hatcheries in Santa Cruz, California, had been sued in California Superior Court for animal abuse. This hatchery sells or sold chicks to poultry companies raising chickens for meat. However, there is no apparent affiliation between Cal-Cruz Hatcheries and California Hatchery.
There may be other reasons not to order from California Hatchery, such as they apparently do not have a location that one can visit. They are listed as being located in Yucaipa, California, but their other contact information is in Vallejo, California (the 530 telephone number). They have one Better Business Bureau complaint regarding a delivery issue that has been closed. They have 3 unfavorable Yelp reviews (including one rant from someone incredulous that the USPS would accept live animals for shipping through the mail). However, even local hatcheries that specialize in hand-raising chicks on a small scale have unfavorable Yelp reviews.
If this company is guilty of abuse, then certainly that would be an excellent reason to avoid them; however, if these accusations are because of mistaken identity, then that certainly would be unfair. I think that their 3 chick minimum as well as the variety of breeds they offer would be a desirable option for some people.