Carnivores including big cats, bears, and wolves have very large natural home ranges that zoos cannot replicate, creating fundamental welfare challenges that are particularly acute for wide-ranging species kept in traditional enclosures.
The welfare challenge for captive large carnivores is fundamental: species that evolved to range over vast territories cannot have their spatial needs met in even the largest feasible zoo enclosures. Stereotypic pacing in lions, tigers, and polar bears represents a behavioral response to the impossibility of meeting range needs in captive environments. While enrichment and complex habitat design reduce stereotypy frequency, they cannot eliminate the underlying welfare deficit. This welfare reality supports a model of fewer species in genuinely larger enclosures rather than diverse collections where spatial needs cannot be met.