The 36-year-old elephant has spent most of his life in a small enclosure with meagre shelter, and the last eight years alone after his companion elephant died.
Animal rights advocates have long raised concerns about conditions at Islamabad's zoo, where dozens of animals including six lion cubs have died in the past four years.
The court decision came after a four-year global campaign, backed by American singer Cher. Plans are underway to move Kaavan, to Cambodia if possible. The 36-year-old elephant has spent most of his life in a small enclosure with meagre shelter, and the last eight years alone after his companion elephant died.
But even with Sinatra, it is no easy feat moving an elephant thousands of miles.
Four Paws experts fired darts with a sedative so they could give the sleepy animal a comprehensive check up.
As Kaavan woke up to eat some apples, Four Paws elephant specialist Frank Goeritz analysed his blood samples. Though it will be a few days before he files a formal report, Goeritz said despite Kaavan being obese, unhappy and having malformed nails that put him at risk of serious infection, the outlook was hopeful.
"Let's wait until we have all the results, but so far I don't see a big problem with him travelling ... he is facing a good life."