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Yes, gerbils can eat a little lettuce, but only the darker leafy kinds such as romaine (cos), and only a small piece once or twice a week. Never give iceberg lettuce. VCA Animal Hospitals and the Gerbil Care welfare site both say to avoid it, because it is mostly water and offers almost nothing, and watery greens can give gerbils diarrhoea.
| Safe? | Yes, dark leafy kinds in small amounts |
| How much | A torn piece about the size of your thumbnail |
| How often | Once or twice a week |
| Best served | Washed, patted dry, raw |
| Watch out for | Iceberg lettuce, loose droppings, wilted leftovers |
Is lettuce good for gerbils?
Dark lettuce is fine in small amounts. Supreme Petfoods lists lettuce among the fresh vegetables gerbils can have in small amounts. But it is a weak choice compared with other greens: lettuce is mostly water, and gerbils are desert animals that drink very little. The MSD Veterinary Manual puts an adult's water intake at about 4 ml (less than a teaspoon) a day, so a big wet leaf is a lot for a small gut.
Burgess warns that too much green food can cause diarrhoea. Keep lettuce small, occasional and one of several vegetables, not the main one.
Which lettuce can gerbils eat?
| Type | OK for gerbils? | Why |
|---|---|---|
| Romaine (cos) | Yes, a little | Darker leaves with more fibre |
| Little gem | Yes, a little | A small cos type |
| Red or green leaf lettuce | Yes, a little | Leafy and darker than iceberg |
| Lamb's lettuce, rocket (arugula) | Occasionally, tiny amounts | Not named by our sources, so we would keep these rare |
| Iceberg | No | Mostly water, little goodness, listed as unsafe by Gerbil Care |
How much lettuce, and how often?
A piece about the size of your thumbnail, roughly 2 × 2 cm (0.8 × 0.8 in), once or twice a week per gerbil. Gerbil Care's rule for all fresh food is about one thumbnail-sized portion per gerbil, around twice a week. VCA says fruit and vegetables together should be no more than 5 to 10% of a rodent's diet.
How to prepare lettuce
- Pick a fresh leaf. Crisp and green, with no slimy or brown patches.
- Wash and dry it. Rinse under cold water, then pat dry so you add as little water as possible.
- Tear a small piece. One thumbnail-sized piece per gerbil.
- Clear leftovers. Gerbils stash food in their bedding, so check after a few hours and remove any wilted lettuce.
Introduce lettuce on its own, not on the same day as another new food. If droppings change, you will know what caused it.
Who should skip lettuce?
Gerbils that have just had loose droppings, gerbils that are new to fresh food and very young gerbils still settling in. Start them on dry food and add greens slowly.
Better greens to try
Burgess suggests broccoli, cabbage, spinach, chicory and cress in small amounts. Try a small broccoli floret, a little spinach, a sliver of carrot or a thin slice of cucumber. Our safe food list for gerbils, gerbil diet guide and complete gerbil care guide cover the rest.
Lettuce questions
Why is iceberg lettuce bad for gerbils?
Iceberg is almost all water with very little goodness in it. VCA Animal Hospitals tells rodent owners to avoid it for that reason, and the Gerbil Care welfare site lists it as unsafe. Gerbils are desert animals that drink very little, so a watery leaf is the kind of food that brings on loose droppings.
Can gerbils eat romaine lettuce?
Yes, in small amounts. Romaine (cos) is darker and has more fibre and vitamins than iceberg. Give a torn piece about the size of your thumbnail once or twice a week, washed and patted dry, and take away anything not eaten within a few hours.
Can baby gerbils eat lettuce?
Wait until young gerbils are fully weaned, settled in their new home and eating dry food well. Then offer a very small piece of romaine and watch droppings for 48 hours. Burgess warns that too much green food can cause diarrhoea, and that hits small youngsters hardest.
My gerbil has diarrhoea after eating lettuce. What should I do?
Stop all fresh food, keep dry food and water available, and keep your gerbil warm. If droppings are still loose after a day, or your gerbil is hunched, wet around the tail or not eating, ring your vet the same day. Gerbil Care warns diarrhoea can be fatal.
