Researchers developed a special probiotic bacteria (Enterococcus faecium) that produces dopamine, a mood-boosting chemical, to reduce inflammation in chickens’ digestive systems. When combined with L-dopa (a dopamine precursor found in Mucuna beans), this probiotic successfully lowered levels of norepinephrine, a stress chemical that promotes gut inflammation. This approach could help poultry farmers improve chicken health and growth without using antibiotics, which are no longer permitted in feed.