Say you have two shops that each want 10 medium rats, say 6 weeks old, every week. Just to provide those 20 rats to those 2 stores once a week you've got to have 120 rats in the shoot growing up. Every week for six weeks you have to put aside 20 rats
BEFORE you start selling them. If they want larges or jumbos the timeline expands dramatically.

You might want to sit and crunch numbers, figure space requirements and then see if any of the stores will do business with you. So. Cal is a tough market.