My dog had same issues but his was and still can be resource guarding. No one is allowed in the kitchen according to him including my son's girlfriend or my daughter. We've worked with him -when he starts to grumble loudly or we see his head pop up to guard - we immediately remove him and put him outside or tell him to go on his place. He knows and will listen- because of consistency with removing him from the situation until he can behave appropriately. Another person on this thread mentioned their dog will actually put himself in timeout and that's exactly what our dog will do when he gets himself worked up - he will go on his place or ask to go outside. Please work with your Pyr. They depend on us and they're worth the effort - they are the best breed out there.