Dear Sara, what a fright! I was so relieved to hear that Carl is now 100% Could have been a seizure. Although, that type of non gran mal seizure in humans tends to be of a briefer length than Carl's episode. Perhaps not so in dogs. I was reading an article recently on D-Con type poisoning and it does cite extreme lethargy as one of the symptoms, although not remedying itself as quickly as with Carl. And, it also mentioned blood in the poop as a major symptom. I am just glad that Carl is up and well! Hopefully, this was a one time only event!! Hugs to beautiful Carl from all of us. Love, Sandra, Cody and Star