Brown hare leverets are born fully furred and eyes-open, scattered individually across a wide area. Human disturbance during their first weeks is a critical welfare threat.
Brown hare leveret welfare is most commonly compromised by well-intentioned human intervention. A leveret found sitting alone in a field is not abandoned - it is following its species' survival strategy of scatter-hiding while waiting for the brief maternal visit. Removing it for 'rescue' means removing it from its mother's reach and placing it in a stressful captive environment where it has low survival prospects. The welfare response to finding a leveret is to leave it where it is, keep dogs away, and observe from a distance. Contact a wildlife rescue only if the leveret is cold, injured, or if a mother is found dead nearby.