Salt licks and mineral blocks sit in almost every small-mammal aisle, brightly packaged and shaped like treats, which creates a strong impression that a cage without one is missing something. For degus and gerbils, that impression is wrong. Both species evolved to extract what they need from modest diets, and both are small enough that surplus minerals stop being harmless quickly. The genuine provision question is not which block to buy; it is whether the staple diet is doing its job.
The Honest Answer: No Routine Lick for Either Species
Neither degus nor gerbils routinely need a salt lick or a mineral block when the staple diet is balanced. A species-appropriate pellet or mix, hay freely available for degus, suitable fresh foods in sensible amounts, and clean water deliver sodium, calcium, and trace minerals in proportions the animals can regulate by appetite. In practice, cage licks are mostly ignored for weeks, gnawed in a burst out of boredom, or investigated and abandoned — none of which resembles an animal correcting a deficiency. If a specific animal has a specific medical reason for supplementation, that advice comes from a vet who has seen the animal, and it overrides general guidance in either direction. Absent that individual advice, leaving the lick out of the setup is the correct default for both species, not a gap in their care.
Why Extra Salt Can Harm Rather Than Help
Excess salt is a burden, not a bonus. Gerbils come from arid country and conserve water and salts efficiently; degus likewise manage on lean rations. Flooding that system with free-choice salt invites the animal to take in far more sodium than its diet intends, with the kidneys doing the extra work of clearing it. A mineral block chewed for entertainment can deliver a similar surplus in a species whose total daily intake is tiny to begin with, so small excesses are proportionally large. Degus carry a second, sharper risk: many mineral products aimed at small mammals are bound or flavored with sugars, and degus are prone to diabetes. Any mineral provision a degu gets — in the rare case a vet advises one — must be sugar-free, checked on the ingredient list rather than assumed. A product that helps the mineral question while quietly adding sugar solves nothing for this species.
The Staple Diet Is the Real Mineral Provision
Redirect the money and attention from accessories to the food itself. For degus, that means constant hay, a degu-appropriate pellet, and leafy extras with nothing sugary anywhere in the feeding plan. For gerbils, it means a balanced gerbil mix or pellet they cannot pick through too selectively, with the bowl checked so the nutritious components are actually eaten rather than sorted out. Fresh water, refreshed daily, carries minerals in and waste out and matters more than any block. Watch the animals rather than the accessories: steady weight, good coat, normal droppings, and eager eating say the diet is complete, while changes in any of those are a conversation for an exotics vet, not a reason to add a lick on speculation. Reading labels is part of that redirection. Degu pellets and mixes sometimes carry molasses, fruit pieces, or sweet binders far down the ingredient list, and a mineral product flavored to encourage gnawing can hide the same problem, so the list gets read before anything enters the enclosure. Gerbil mixes deserve the same scrutiny in reverse: a mix heavy in sunflower seeds invites selective feeding, leaving the balanced components — and their minerals — uneaten in the bowl.
When helpers take turns, the no-lick rule sits in plain view in the Care Teams record KinsLe keeps for the cage, and completed feeds are marked there so a second helper never tops up blindly.