Suma, a 45-year-old elephant and long-time resident of the Zagreb Zoo, was bereaved and inconsolable after her pachyderm partner of tens years died of cancer.
"Suma became very depressed after her roomie Patna died in early May," the head of Zagreb Zoo Mladen Anic said.
"She was refusing to eat, became uncommunicative, showed all the signs of a serious depression."
Then, by sheer accident, Suma's keepers discovered that the healing power of Mozart extends to the animal kingdom too.
Earlier this month, the zoo organised a concert of classical music just opposite Suma's dwelling.
At the sight of five musicians preparing themselves to start a concert, Suma became very nervous and aggressive, peppering the intruders with little stones that she blew out of her trunk.
"But as soon as the concert started what we saw was really fascinating. Suma leaned against the fence, closed her eyes and listened without moving the entire concert," Mr Anic said.
When zoo authorities realised that classical music seemed to help Suma cope with her grief, they bought a stereo and installed it so she could get a daily dose of music therapy.
Mr Anic said the elephant especially adores Mozart, but is also partial to the strains of Vivaldi and Bach.
"We are so glad that we can provide - at what is a rather advanced age for elephants - things that Suma really enjoys," he said.