My thoughts go out to Brockies family.
I lost my Rotty boy, also named Brock, at the age of 4 yrs to AIHA.
Came home from walking the other dogs, to find him down, laying in pools of blood. By the time i scooped him up and rushed him to the vet, he was too far gone, his lungs were full of blood and he was virtually drowning. He crossed the Bridge in my arms on the floor of the Vet Clinic.