When it was clear the young lion was ailing, the circus took him to a vet in Valencia, Spain, to be euthanized.
Jimenez, who is based in Valencia, was at the vet when Magnus was brought in. Though his Massachusetts-based rescue group usually does international work with cats and dogs, he quickly volunteered to pay for Magnus' treatment when he saw the state of the young lion.
Though a cub his age should weigh 45 pounds, Magnus was around only 20 pounds when he arrived at the hospital, Jimenez said, adding that the pictures posted online were taken after three weeks of intensive treatment.
When it became clear that the cub had been severely abused, Spanish officials intervened and legally seized him from the circus. He has since been receiving treatment at the Valencia hospital, funded by Jimenez and Let's Adopt! Global.