I had posted this weekend about my little man having a swollen face. We initially thought he had gotten a spider bite or something so we gave him some Benadryl with no results. As time went on, the swelling became more localized to his right gum line. Saturday night his tooth fell out. His face was still swollen and sore on Sunday, but he was no longer lethargic and back to acting like his old wonderdog self.
This morning there was some bloody spit in our bed. What we suspected to be an abscess had started to drain in the night. (Time to wash my nice white sheets AGAIN this week) We got him into the vet and they confirmed it was an abscess. He's on some antibiotics and I have some pain meds/anti-inflammatories for him, plus some probiotics to give him after the antibiotic cycle. They'll take some X-rays when they put him under for his neuter to be sure it isn't a dental cyst.
Otherwise, we're very happy to have our little man acting like himself again. It was scary to see him so lethargic. Thank you to everyone for the advice. It's reassuring to have some support out there. We got several phone calls asking about Sterling all weekend long. Apparently word of a sick puppy travels fast!