I am not in california but if I remember correctly the ban was on live not frozen you should check that but if that is correct you can buy frozen. gerbils are from Mongolia and not related to ASFs other than they are all rodents. I seem to recall as someone pointed out that gerbils are illegal too in Cal. Hamsters might be as well following that logic of escapees. I don't know.

As for nutrition...

http://www.nal.usda.gov/awic/zoo/Who...nal02May29.pdf