My dog (beagle) has been sneezing on and off since last evening. He'll sneeze 10-20 times, then he's okay for a couple hours. Then the sneezing starts again. He's sneezing now. If it continues, I will call the vet on Monday. This happened once before, a few months ago, when he bumped his nose into something outside, but it was over after a couple hours. Has anyone else run into this with their dogs? A new allergy maybe? No new carpeting, furniture, etc. No change in diet. He's almost 12 years old, and has not been kenneled, to dog parks, etc. so I don't think he would have picked something up.