Poultry do indeed mourn, and I am glad to see an article that goes over this and explains how the brains of birds are far more complicated than humans believe. Rather than being the mindless and emotionless animals that chickens are stereotyped to be, they are intelligent and capable of complex thinking.
I personally have an example of chickens mourning. I used to have three chickens who were inseparable, and they seemed to not care about the pecking order and behaved as their own, peaceful mini-flock. There was Basil, a Blue Marans; Sable, another Blue Marans; and Hazel, a Cream Legbar. They were the friendliest to humans and love attention, and they did everything together. One day, Sable got sick and we had to move her in a separate box so she could heal and not transfer her sickness to her friends. But it only did her worse to be away from them, and she would not eat or drink. The next day, seeing that she had no improvement, we put Basil and Hazel in the box. Sable immediately lightened up and started eating and drinking, and she eventually got over the illness.
Hazel was the next to get sick months later, with something wrong with her respiratory. She was gasping for air and she couldn't breathe correctly. Hazel unfortunately ended up dying, and both Basil and Sable were depressed after that.
As if that was not enough, Sable started to get weak when something unknown was keeping her from producing droppings, and she would throw up water. She died from the issue, and we never figured out what it could have been.
Basil was never the same after both of her best friends passed away. She would cry all day with a mournful call, and eventually got over making so much noise, but anyone could tell she was still mourning. She had been so nice to humans, but suddenly she was flighty and hated being touched, as if attention reminded her of the days where she still had friends. Basil has calmed down a bit, but still is wary.
I personally have an example of chickens mourning. I used to have three chickens who were inseparable, and they seemed to not care about the pecking order and behaved as their own, peaceful mini-flock. There was Basil, a Blue Marans; Sable, another Blue Marans; and Hazel, a Cream Legbar. They were the friendliest to humans and love attention, and they did everything together. One day, Sable got sick and we had to move her in a separate box so she could heal and not transfer her sickness to her friends. But it only did her worse to be away from them, and she would not eat or drink. The next day, seeing that she had no improvement, we put Basil and Hazel in the box. Sable immediately lightened up and started eating and drinking, and she eventually got over the illness.
Hazel was the next to get sick months later, with something wrong with her respiratory. She was gasping for air and she couldn't breathe correctly. Hazel unfortunately ended up dying, and both Basil and Sable were depressed after that.
As if that was not enough, Sable started to get weak when something unknown was keeping her from producing droppings, and she would throw up water. She died from the issue, and we never figured out what it could have been.
Basil was never the same after both of her best friends passed away. She would cry all day with a mournful call, and eventually got over making so much noise, but anyone could tell she was still mourning. She had been so nice to humans, but suddenly she was flighty and hated being touched, as if attention reminded her of the days where she still had friends. Basil has calmed down a bit, but still is wary.