IF you are entering at Lukeville, and you will be, and IF you have a visible pet, you will be stopped. Without a visible pet, you will not be stopped. With a visible pet, you will be required to produce a health certificate for the pet that includes rabies information. Then they will check your fridge. It's a tap dance. We spent about 15 minutes with the vet and her staff that were checking in October. They "waved" the health certificate for our cat, I had them for the dogs. This year I made sure that all the meat in the freezer was cooked, or appeared so. Lots of back and forth, we didn't get aggressive, but made it clear that we knew the rules. They didn't take anything, and gave us a brochure that states that, "It's not the law, it's for the good of Mexico." So, end result is, they want to change the laws, but haven't. Be nice. BTY, the forms for health certificates are available on line, and can be filled out there.
We choose to cross there because it's closer, good roads, and if you are nice, it all works.