Importation of dog into Mexico

I cross at Nogales every year, no problems heading south, of course have all your dogs records up to date. Coming back is a mixed bag, last year no one cared about dog paperwork, but the year before the woman agent was a bitch, scrutinized all the papers. Always be prepared and always be patient, remember no eggs, any pork products, chicken only if fully cooked. Check the US Customs website.