having the procedure done certainly lowers the risk factor but it is not foolproof..... two of my past goldens both had cancer, on the first one we had it removed, but it grew back twice as strong (and WAY BIGGER) than what it was before, by the time she died we had removed the tumor on her belly (about the size of a golf ball.....) and it grew back (to about the size of a COWS UTTER!!!! IT WAS SO BIG IT WAS DRAGGING ON THE GROUND)...... my other golden died of canine distemper due to her lack of immune system (because of the cancer)
I certainly hope youre baby does ok, you do have a right to be angry, but i would concentrate on love for right now