The dolphin with a broken heart

Times Online has this news which stroke me a lot. Read:

When the young dolphin was rescued from the Adriatic Sea, distressed and bruised, she was nurtured back to health by a dedicated trainer who took responsibility for her care.
Now the trainer is dead, the victim of a frenzied attack by her neighbour — and the dolphin, apparently, is dying of a broken heart.
The extraordinary story of love emerged yesterday as keepers at the Oltremare water park in Riccione appealed for international help to save the life of their dolphin.

The dolphin's name is Mary G. and since her trainer's is dead, is refusing to eat. This can only restate the fact that animals do have feelings and emotions, maybe in primary states, but they do feel sadness or anger.