Impact of dietary amino acid levels on body fat, laying-hen performance

Amino acid requirements for laying hens are not well understood, primarily because data are lacking for the pullet stage. This gap is increasingly important as the table-egg industry wants to extend the hen’s life cycle to 100 weeks or more. Jo Ann Chew, graduate research assistant, University of Alberta, investigated how amino acid levels during rearing might impact body fat and the onset of lay.

Whole plant part phytogenics for inflammation balance

Gut inflammation is common throughout poultry production, but its effects are not always visible. Birds deal with stress every day through changes in environment, feed adjustments, handling and exposure to coccidiosis and other intestinal diseases. All of these changes trigger the immune system to send a response to manage the inflammation.

Out-of-the-box approach to control necrotic enteritis

At the 2025 Poultry Science Association annual meeting, Michael Carroll, graduate assistant at Iowa State University, presented his research investigating whether dietary changes can produce a useful immune response to combat necrotic enteritis.

Columbia University to test new strategy for curbing bird flu on poultry farms

When it comes to resisting bird flu, chickens on poultry farms are like sitting ducks. Last year, a highly pathogenic avian influenza virus, H5N1, ripped through poultry farms across the US, prompting farmers to cull tens of millions of chickens to contain the outbreaks. But far-UVC light may offer a safe and practical way to inactivate any type of virus in the air, reducing the chance of transmission.

How stocking density impacts welfare and production in cage-free laying hens

In the United States, the majority of laying hens are housed in conventional cages. However, there has been a shift towards cage-free systems. Cage-free systems can benefit laying hen welfare. Birds have opportunities to perform a full range of species-specific behaviors, including foraging, dustbathing, perching, and walking, which are restricted in conventional cages.

Chronic stress decreases neurogenesis in poultry

Poultry researchers use ‘affective valence’ — a positive or negative emotional response — as a measure of animal welfare. Tom Smulders, PhD, an evolutionary neurobiology researcher from Newcastle University, has studied whether hippocampal neurogenesis can be a marker of affective valence in poultry.