Every dog experiences so much through its mouth. We’ve had three dogs over the years, and our last one - Heather – had quite an “oral fixation.”  She loved to climb up on my husband’s lap and lick his cheeks. When she didn’t feel well, she always wanted a small dish of milk. She would see it coming…wag her tail…and the milk would quickly disappear from the bowl. Every time we prepared food in the kitchen, she would roam around at our feet, and would quickly  lap up even the tiniest crumb that fell to the floor. If a grape hit the ground, she would pick it up and race back to her bed. However, she had no idea what to do with it! She would roll it around in her mouth, then spit it out. Over and over again. Clearly, the taste and texture weren’t pleasing. Yet it was months before she realized that it was best for her to ignore any grape that came her way. And then, of course, when I once dropped a small chunk of raw hamburger, she moved with incredible speed an...