Looking for any help in understanding. Earlier this week our 7 1/2 year old goldendoodle Murphy, in what we thought was in "perfect health," passed away while at our vets waiting for his teeth to be cleaned. Our vet, who my family has used for 20 years, told us he gave him a sedative and when he was ready to begin procedure, picked up Murphy, who immediately collapsed and cpr was given without success. No one is really sure what happend, heart attack, stroke, ect.