Sorry to hear about Dexter's sudden illness. I can relate - our now 1 year old boxer boy was diagnosed with chronic renal failure 2 months ago! We noticed he was always thirsty (he had to be pulled away from water because he would drink it to the point of getting sick), had to pee a lot, and was wetting the bed in his sleep. The vet first thought it might be a urinary tract infection, treated that. Then we tried treating the incontinence. After multiple urinalysis, blood checks, and ultrasounds from both our vet and the breeder's vet (free of charge for the second opinion thankfully), the results came back as our worst fear. The only thing we can really do for him is put him on a special diet and give supplements and lots of love. Hope you find out what's really going on soon!