When an Elephant Stops Eating: Interpreting Changes in Appetite and Feeding Behaviour

A reduction in food intake can be one of the earliest observable changes in an elephant that is becoming unwell. 

The difficulty is that reduced appetite is not a diagnosis. It may accompany gastrointestinal disease, systemic infection, oral problems, pain, metabolic disturbance or changes in management. 

The clinical value lies in recognising when a change in feeding behaviour is different from the elephant's normal pattern and what accompanies it. 

Start with the change, not the label 

“Not eating” can describe very different situations. 

An elephant may: 

• Refuse all food; 
• Eat selected foods but reject others; 
• Eat more slowly; 
• Drop food while chewing; 
• Reduce water intake; 
• Approach food but fail to consume it; 
• Resume eating intermittently. 

These distinctions can help determine what needs to be investigated. 

A survey of veterinarians working with Asian elephants identified anorexia among the clinical abnormalities encountered across range countries, alongside gastrointestinal, oral and systemic problemsⁱ. The survey also highlighted substantial variation between regions and management systems, reinforcing that appetite change needs to be interpreted within the individual and its setting^[1]. 

Look at what changed around the feeding behaviour 

A useful assessment should document more than the amount of food left uneaten. 

Consider: 

• What foods are being refused; 
• Whether preferred foods are also refused; 
• Whether chewing appears altered; 
• Whether water intake has changed; 
• Faecal output and consistency; 
• Activity and mobility; 
• Body condition; 
• Recent dietary changes; 
• Recent medication or illness; 
• Changes in social or management conditions. 

Research on captive Asian elephants has demonstrated substantial variation in diet composition, food intake and nutrient supply between collections^[2]. 

This means that an apparent reduction in appetite should not automatically be interpreted as reduced nutritional intake without considering what the elephant was actually offered and consumed before the change. 

Appetite loss becomes more concerning when other signs appear 

The clinical significance changes when reduced feeding occurs alongside other abnormalities. 

In reported EEHV cases in Asian elephants, lethargy and appetite loss were among the most frequently observed clinical signs^[3]. That does not make anorexia specific for EEHV; rather, it illustrates why a sudden feeding change in a susceptible calf should not be dismissed as a behavioural issue. 

Similarly, gastrointestinal disease can present with appetite loss alongside changes in faecal output, abdominal discomfort or other systemic abnormalities. 

The important distinction is therefore: 

Appetite loss is a clinical signal that gains significance from its accompanying findings. 

A feeding change can reveal a management problem 

Not every reduction in food intake is caused by disease. 

A feeding change can also be influenced by the way the elephant is managed. Longitudinal behavioural monitoring of zoo-housed Asian elephants has demonstrated substantial individual differences in feeding, locomotion and other components of the activity budget, supporting the value of tracking an elephant against its own established pattern rather than relying on a generic behavioural expectation^[4]. 

A practical history should therefore ask: 

Did the elephant stop eating, or did something about the feeding opportunity change? 

This distinction can prevent an environmental or dietary change from being mistaken for primary disease—and can also prevent genuine disease from being attributed to management without adequate assessment. 

Track the individual elephant 

For elephants examined regularly, documenting usual feeding behaviour provides a useful baseline. 

Useful observations include: 

• Approximate daily intake; 
• Preferred and routinely accepted feeds; 
• Feeding duration; 
• Feeding rate; 
• Water intake; 
• Faecal output; 
• Body condition. 

A gradual reduction may be clinically different from complete anorexia developing over several hours. 

The direction and speed of change therefore matter. 

Clinical takeaway 

A change in appetite should be treated as a clinical signal, not a diagnosis. 

The most useful assessment combines feeding behaviour with faecal output, body condition, activity, oral findings, recent management changes and other clinical signs. 

The key question is not simply “Is the elephant eating?” 

It is: 

“How has this elephant's feeding behaviour changed, and what has changed with it?”

References:

1. Miller D, Jackson B, Riddle HS, Stremme C, Schmitt D, Miller T. Elephant (Elephas maximus) Health and Management in Asia: Variations in Veterinary Perspectives. Vet Med Int. 2015;2015:614690. https://doi.org/10.1155/2015/614690
2. Romain S, Angkawanish T, Bampenpol P, Pongsopawijit P, Sombatphuthorn P, Nomsiri R, Silva-Fletcher A. Diet composition, food intake, apparent digestibility, and body condition score of the captive Asian elephant (Elephas maximus): a pilot study in two collections in Thailand. J Zoo Wildl Med. 2014 Mar;45(1):1-14. https://doi.org/10.1638/2011-0261r3.1
3. Yun Y, Sripiboon S, Pringproa K, et al. Clinical characteristics of elephant endotheliotropic herpesvirus (EEHV) cases in Asian elephants (Elephas maximus) in Thailand during 2006-2019. Vet Q. 2021;41(1):268-279. https://doi.org/10.1080/01652176.2021.1980633
4. Fazio JM, Barthel T, Freeman EW, Garlick-Ott K, Scholle A, Brown JL. Utilizing Camera Traps, Closed Circuit Cameras and Behavior Observation Software to Monitor Activity Budgets, Habitat Use, and Social Interactions of Zoo-Housed Asian Elephants (Elephus maximus). Animals (Basel). 2020;10(11):2026. Published 2020 Nov 3. https://doi.org/10.3390/ani10112026