Difficult situation and only one way to deal with it..... LIE!

It does not matter what breed, size or where the dog is living - human food as treats is not going to help anyone.

So .... not nice to lie to the inlaws but you guys need some control over how your dogs behave as it is your responsibility.

If parents/ in-laws/friends will not listen to you then start to take your dogs "to the vet" because they have started behaving oddly, the have red skin patches and are starting to lose hair. The "vet" does some tests and gives a very grim outlook for the dogs - high blood pressure, high cholestral, changes to brain patterns etc.

This, of course, costs you an absolute fortune! Ask if the parents can lend you money to cover the costs. Say you would rather have the dogs put down than let them suffer like this!!!! Say that you don't understand how this is still happening, it must be the neighbours, after you told the in-laws how important not feeding titbits was.

I actually couldn't do this but have a friend who does VERY well