And they were pretty damned good years, especially for a large male captive orca whose previous life had mainly been stuck inside tiny concrete pools. His pool in Oregon was the nicest orca pool in the world, and he regained his health there, losing the papiloma virus and gaining large amounts of weight. His Icelandic seapen was even better; he grew healthy and strong there, and relearned how to hunt on his own quite efficiently.
Keiko was functionally free beginning in the summer of 1999, allowed to roam at will out of his seapen, but returning voluntarily until that day in August 2002 when he hooked up with a pod of wild orcas and never came back, showing up in Norway instead and reestablishing contact with humans.
The Keiko experiment was not a failure except in reaching a final goal that the industry had a direct hand in ensuring was never reached - namely, a positive identification of his familial pod so he could be reunited with them. What we learned from Keiko is that such identification is vital to a complete reintegration.