How the in-laws ruined a perfectly good dog

We just returned from a long weekend with the in-laws.  Since they don't have any grandchildren of the two-legged variety, The Boy has to do.  It is our belief that dogs don't need to eat people food.  That belief, combined with the fact that The Boy has an incredibly delicate constitution, has kept The Boy on a strict dry food diet, peppered with the occasional milkbone.  The In-laws did not understand how we could be so strict with someone so cute.  Here is a partial list of the items ingested by our dog, courtesy of the in-laws:

steak

bbq chicken

crackers

crusty italian bread

popcorn

stuffing

pretzels

apple juice?

I don't know why the FIL thought The Boy needed to try apple juice.  We've been home for 3 hours, and The Boy is now begging every time we put hand to mouth.

Now I'm left wondering...how long does it take to deprogram a dog?