Gerbils are popular small pets that are frequently misunderstood. Their strong social bonds, digging behaviour, and specific environmental needs are often not met in conventional pet keeping.
Gerbil welfare is shaped by two fundamental needs that are frequently unmet in captivity: social companionship and burrowing opportunity. Gerbils form lifelong pair bonds — the loss of a companion causes measurable grief responses and immune suppression, and introducing a new companion to a widowed gerbil is often very difficult due to their territorial nature. Pairs established from a young age are the most stable social unit. Deep substrate — at least 30 cm — allows the elaborate burrowing behaviour that is a core gerbil drive; barren enclosures with shallow bedding produce stereotypic digging at corners that clearly indicates the behaviour is unmotivated rather than satisfied. Commercial gerbil cages are typically inadequate in both floor space and substrate depth. Gerbils are excellent model animals for welfare researchers studying the behavioural effects of environmental enrichment.