Not a new dog but a new problem. Little history first. Last year or so I brought my setter to the vet. We figured he'd eaten some wood, it got lodged in his gums and infected a gland in behind his eye. The eyeball bulged out in a most grotesque manner. Through medication and mortgaging the house the problem eventually cured.
So, this morning my wife takes the dog on his usual walk on the lease because he still wants to eat just about anything he comes across. They get home and the dog gets his treat then crashes on the couch as he usually does. Only this time he becomes very lethargic very quickly. He can't stand, or raise his head, simply won't move and seems to react in pain when I touch him. I put him on a blanket, slide him to the door so I can get him closer to the car. We're off to the vet.
He's still staggering all over the place.
We now have a diagnosis but I'm going to let you folks have a kick at the outcome. Your thoughts about what was going on then I'll come back and let you know the verdict.