In snow, the warrener would spread gorse and tree boughs as shelter and food.
From the edp24.co.uk
The warrener, a highly-paid and prestigious individual, had to bore holes to make burrows and provide food such as thistles, dandelions and groundsel.
From the edp24.co.uk
More examples
Maintains a rabbit warren
21671 Warrener (1999 RP12) is a main-belt asteroid discovered on September 7, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.