Feed intake is what turns a well-formulated diet into animal performance. When your livestock eat less or refuse feed, they also take in less of the energy and nutrients needed for growth, milk, eggs and recovery. What begins as a change in appetite can therefore become a much broader performance issue.
Reduced feed intake & feed refusal
Feed refusal and reduced feed intake: when animals walk away from the feeder, growth goes with them.
Every lost meal is growth you won't get back
Animals decide what to eat with their nose and tongue first. Scent and taste are the strongest signals their chemical senses respond to, so a diet can be perfectly balanced on paper and still be left in the trough. Minerals, medication and some by-products bring real nutritional value, but they also bring odours and flavours animals instinctively avoid.
Then there is everything the animal is going through. A change in raw materials can trigger an alarm reaction, and the group eats more cautiously for a few days. Heat makes animals cut back on purpose, because digesting feed produces warmth they're trying to get rid of. And some mycotoxins, deoxynivalenol (DON) in particular, are known for causing vomiting and feed refusal in pigs.
What makes this costly is timing. Intake tends to drop at exactly the moments animals need nutrients most: at weaning, after a diet switch or during a heat wave. Modern genetics raise the bar even further, because high-potential animals need consistent intake to deliver what they're bred for. So when appetite slips, it's worth asking why before it shows up on the scale.
Appetite can drop when animals need nutrients the most
The feed is what your animals eat over a production cycle. Select a dip to see what triggers the drop.
Weaning
Weaning
A new diet, a new pen and no sow: piglets eat little in the first days. Every lost meal is growth you won't get back.
Diet change
Diet change
A change in raw materials triggers an alarm reaction. The group eats more cautiously for a few days. Every lost meal is growth you won't get back.
Heat wave
Heat wave
Digesting feed produces warmth, so in the heat animals cut back on purpose. Every lost meal is growth you won't get back.
Mycotoxins (DON)
Mycotoxins (DON)
Deoxynivalenol (DON) in particular is known for causing vomiting and feed refusal in pigs. Every lost meal is growth you won't get back.
Illustrative curve.
What a smaller appetite looks like in your animals
How Innovad helps your animals keep eating
Common questions about reduced feed intake and feed refusal
What is the difference between reduced feed intake and feed refusal?
Reduced feed intake means animals eat less than they need, often gradually and across the whole group. Feed refusal is more abrupt: animals reject a feed, sort it, or stop eating it entirely. Refusal usually points to a specific trigger, such as an off-smell, an unfamiliar taste or a contaminant like DON.
What are the most common causes of reduced feed intake in livestock?
The main causes are changes in feed formulation or raw materials, unpleasant tastes and odours from minerals, medication or by-products, heat stress, weaning and other transitions, illness, and mycotoxins in the feed. In practice, several of these often happen at the same time.
Why do pigs refuse feed?
Pigs are very sensitive to both taste and contamination. They react quickly to unfamiliar smells after a diet change and are the farm species most sensitive to mycotoxins. DON in particular is linked to vomiting, feed refusal and lower gains. Weaning adds a new diet and environment on top of that, which is why intake often dips just after it.
How does heat stress affect feed intake?
When temperatures rise above an animal's comfort zone, it eats less on purpose, because digestion and metabolism produce body heat. Humidity makes this worse. The animal also drinks more and redirects energy to cooling down instead of growth, so performance drops even if feed is available.
How can I improve feed intake, and what does Innovad offer?
Start by finding the trigger: check recent diet changes, feed quality, mycotoxin levels and climate conditions. Our feed intake & palatability solutions give feed a stable, appealing smell and taste. Mycotoxin management tackles contamination-driven refusal.