Thank you so much for the good thoughts and prayers. Sorry it's taken me so long to post. It was a late night and we all went back to bed after the 4:00 am test, feed (no shot Klinger was 53!). The vet dx it as a collapse/fainting episode due to underlying heart disease. I was petting him on the bed and all of a sudden he collapsed/seized and when he came out of it, he started panting and crying. It was freaky. We rushed off to the er vet, which is about 25 minutes away and I didn't think he would make it. He open mouthed panted with his tongue out all the way. (sorry for the details). About a block away his breathing improved. The doc examined him and his heart rate was slightly decreased. The xray showed advanced heart disease and some fluid that they gave him lasix to get rid of. He has a follow up with the cardiologist on Monday. He doesn't seem "right" to me.