The Dud

I'm worried about the Dud. He hasn't eaten in two days. Two days ago I came home from a playgroup and when I opened the door, the smell of my house almost knocked me on my rear. I'm not even sure if he's drinking, it's so hard to tell with two dogs using the same bowl, and me being as busy as I have been the past few days. I think it's been long enough though, I'm calling the Vet. as soon as they open, which is in about 15 minutes. I'm so worried about him. He's just so lethargic and weak. He looks at us with pouty eyes, and I can tell he's hurting. I really hope this is just a virus or something and the Vet. can put our minds at ease and his pain at bay.