What is the ruling on breeding some endangered animals, such as the lynx and the civet, with the aim of increasing their numbers and then releasing them, and what is the ruling on breeding giraffes?

The fundamental principle regarding the possession and raising of animals is permissibility, except where a specific religious text indicates otherwise. Therefore, the ruling on raising the animals mentioned in the question falls under the principle of permissibility. However, it is more befitting for a Muslim not to expend their money, effort, and time except on what brings them benefit.