You are now allowed 4 Hens now in Temecula now.. Here is the code from City of Temecula web site.
2 only allowed for the higher zoning districts
Only for LM and M districts.
17.10.020 Supplemental development standards.
iii. Poultry. Limited to fifty poultry per acre. A maximum of twelve poultry are allowed on lots less than one acre in the RR, VL, and L zoning districts. A maximum of four poultry are allowed on lots within the LM and M zoning districts. Poultry under the age of three months are not counted. All poultry must be confined. The keeping of roosters is prohibited.