My Grandparents Visiting

My grandparents are visiting from Illinois and my grandpa is grumpy all the time. He does not like my dog either, which is a huge problem for me! All my dog has done was try to lick him and my grandpa hates my dog. My grandpa keeps making comments about putting the dog in a giant cage outside. My parents keep telling me "hold your tongue" because I make smart remarks after he says mean stuff about my dog.