Brooks, D. L., Huls, W., Leamon, C. et al. 1993. Cage enrichment for female New Zealand White rabbits. Lab Animal 22(5), 30-38.

The paired rabbits preferred to be together (90 percent of the time). .. Even though an individual J feeder and a lixit waterer were in each cage, the paired rabbits usually preferred to share their food and water. Fir-wood gnawing sticks were used during the 2-year study period as effective enrichment objects for single- and pair-housed animals without noticeable hygiene and health problems.