Is your axolotl refusing to eat for a few days? Don’t panic right away: this behavior can be harmless… or it could indicate a more serious issue. The key is to identify the cause and respond methodically. Here are the possible reasons for appetite loss in axolotls and the actions you can take.

1. Is the water temperature suitable?

Axolotls are sensitive to temperature. Water that is too warm slows their metabolism and can cause stress, often leading to a refusal to eat. Ideally, the water should be kept between 16 and 18 °C, with a maximum tolerance of up to 20 °C in summer.

During heat waves, place the tank in a cool room, cover the side panels, reduce lighting, and avoid any external heat sources (overpowered filter, direct sunlight, etc.).

2. Change in environment or routine

A move, a new tank, the addition of a decorative element, or even a change in feeding schedule can disturb an axolotl. This stress may temporarily suppress its appetite. Sometimes it just takes a few days for it to get used to its new environment.

3. Poor water quality

A spike in nitrites or ammonia, a pH that is too acidic, or overly stagnant water can make the axolotl uncomfortable or even sick. A sudden loss of appetite can be the first sign of an imbalance.

Test the water with appropriate strips or liquid tests and check:

• Nitrite level = 0 mg/L
• Ammonia level = 0 mg/L
• pH between 6.5 and 8
• Nitrate level below 40 mg/L

If in doubt, perform a partial water change (30–50 %) and monitor the situation.

4. Health problems

Parasites, an internal injury, an infection, or a foreign object swallowed accidentally can cause appetite loss. Watch for the following signs:

• Abnormal bloating
• Unbalanced swimming
• Retracted or pale gills
• Unusual lethargy

If these symptoms persist, it’s best to consult a veterinarian specialized in exotic pets.

5. The axolotl is simply full

Unlike some domestic animals, axolotls don’t eat every day. An adult can easily go 2 to 4 days without eating without consequences. Juveniles will eat more often (daily or every other day), but in smaller amounts.

If your axolotl ate well recently, it may simply still be full.

6. The offered food is unsuitable

Some axolotls are picky: they prefer live food or refuse pellets if they don’t sink. Try different options:

• Bloodworms (live or frozen)
• Earthworms, chopped or whole
• Pellets specifically for axolotls
• Small pieces of liver or fish (only occasionally)

Offer the food with tweezers, as close to the axolotl’s mouth as possible, to stimulate its hunting instinct.

7. It might just be… normal!

An adult axolotl may fast for a few days, especially during seasonal changes or when preparing to shed. This behavior is natural as long as it remains active and otherwise healthy.

What if it lasts?

If the axolotl stops eating altogether for more than a week, or if this is accompanied by changes in behavior or appearance, action is needed:

• Perform a full set of water tests
• Isolate it in a quarantine box with clean, cool water
• Try offering tempting live food
• Reduce lighting and human interaction

Conclusion

An axolotl that stops eating isn’t necessarily in danger, but it always warrants careful observation. In most cases, a mild cause (stress, temperature, unsuitable food) is to blame and can be resolved quickly. If the behavior persists, it’s best to consult a professional to prevent the problem from worsening.