Being someone who crosses the border often I can, with confidence, say that the problem with Beef was in taking it south, not north. Had to do with our mad cow. That said that ban is over, although last time they asked us anyway..... mind you, they only asked they didn't take anything away.
They almost always ask about fruit so we pick that up in the country we are heading into rather than risk losing it.... though once we had grapes going south and they didn't care.
You may need to show proof of rabies, but we travel with the dogs crated and haven't ever been asked to show that the dogs match the certificate and most of the time they don't ask for the paperwork either.