We will be crossing Lukeville/Sonoyta next week, I do have meat based canned dog food. If he asks for it I will ask to see the list for restricted items entering Mexico. Also no health certificate for our dogs, just all their vaccination papers. I'll keep you posted on this one.
I have had to ask for the list in Guerrero Negro once a few years back when they started asking for avocados after they had taken my limes, what are you planning on making guacamole? They couldn't come up with a list and just took the limes. This is where they also tried to charge for spraying our tires with insecticide. I had seen the commercial truck ahead of us being sprayed and not asked for a dime. Guess what it is a free service!