Even worse, they're selling stuffed lion cubs, supporting the killing of endangered animals for the viewing pleasure of humans.
The reason they can't give them or sell them to other zoos is due to a lack of planning. The process is very long and drawn out, every country has different regulations regarding the transport, purchase, and conditions under which zoo animals can be exchanged. It can take years of planning and organisation, but in my opinion that's no excuse. If you can't deal with the cubs then don't let them breed, and if you're worried about their social structure being interferred with by removing the males then you need to have a breeding program organised with other zoos. Most endangered animals have a studbook for breeding in captivity and one person who deals with that book in the world. That person determines which animals should breed with which in order to conserve the species. I don't know why these people aren't operating under this system.
The reason they can't give them or sell them to other zoos is due to a lack of planning. The process is very long and drawn out, every country has different regulations regarding the transport, purchase, and conditions under which zoo animals can be exchanged. It can take years of planning and organisation, but in my opinion that's no excuse. If you can't deal with the cubs then don't let them breed, and if you're worried about their social structure being interferred with by removing the males then you need to have a breeding program organised with other zoos. Most endangered animals have a studbook for breeding in captivity and one person who deals with that book in the world. That person determines which animals should breed with which in order to conserve the species. I don't know why these people aren't operating under this system.