OK I love the name Grandma Cow. My DGK call us Grandma & Grandad Rudy. When they were little we had a Dalmatian named Rudy--that's how they knew us from their other grandparents because they were told they were visiting grandparents with Rudy. Since then we've had another dog (Patches) but the nickname stuck. It's funny when they introduce us to their friends they don't know what to call us LOL. We just laugh because their friends call us Mrs or Mr Rudy.