Pit Bulls' fake love.
Yup, they loved her to death. I doubt she was in complete bond with them. IIRC, she had been absent from them and was not on a day today contact with them. She decided to take them both for a walk. Many different things can set off a terrier, especially a pit bull. Something as simple as a squeal if she had tripped and fell or trying to get between the two if they had a dust up. We will never know what caused them to snap, but they did and she is dead.