One of the lectures I am presenting at Best Friends for the PPG is on creating Peaceful Multi-dog Households. Here is a video of when Martina Sunnas and I lived together with all our dogs and Martina just got a new puppy. Instead of just seeing what might happen when having all the dogs eat high value chews together for the first time, we used management and prevention. All the adult dogs were already trained not to bother others with their chews, but Lumos the puppy didn't know that yet. Often, puppies will see what another dog is eating and even although they have something that is similar they might drop what they have and run over to the other dog… So instead of just hoping that didn't happen, we set up the environment for success! Lumos was put on leash, so if he suddenly decided to bother the other dogs, he wouldn't be able to, before he had learned leave it or a recall with reliability. Another thing to do is giving the puppy a chew that lasts longer than the other dogs chews… So that the puppy doesnt end up frustrated after he finishes what he has and the other dogs are still eating. If the puppy did finish the chew, you could sit with the puppy and feed high value treats for the puppy just continuing to settle and not bother the other dogs. If you have dogs that do "hover" over other dogs eating you would need to use prevention like a leash or baby gate. If you have a dog who guards food, you have to take even further precautions, as the excitement of eating something novel or extremely high value can then affect their behavior, even after the chew is gone… For example, they could suddenly revert to guarding crumbs on the kitchen floor that they have overlooked before, or guarding the location they ate the chew in.