Prince Charles used to have a Jack Russell who has since past named Tigger (Tigga) and another named Pooh. I am not sure if Pooh is still with us. As for Camilla, she has three Jack Russell terriers, Tosca, Rosie and Freddie. Freddie is one of Tigga's pups.
I can't believe that Diana made Charles give away one of his pets. That's awful. I do remember reading an anecdote about Charles' beloved Tigga mentioned above and that someone in Diana's household or she herself, put the dog in an oven. I don't know if the oven was on or not, but hearing that story was very disturbing to me.