Dear Dr. Fox: My 4-year-old English cocker spaniel has significant folds on the lower side of her mouth. About six months ago, she began leaving dark spots on the furniture, our clothes and the bed.

Today I’m going to show you how to take out saliva stains. Now, if you have kids, you realize that saliva has a lot of proteins in it and it does stain, and babies do drool. So this is what you’re ...