If the tree itself is Prunus laurocerasus and it is completely ripe, there is no problem. At least for my chickens. I do not force feed it. They climb the tree and eat the fruits themselves during fruiting season. I have never seen one of my chickens die just because of prussic acid. But maybe it would be better for the chickens to remove the seeds. What I have observed in my chickens is that they eat the fruits by tearing them apart with their beaks instead of swallowing them whole every time they try to eat them. We also eat the fruits and make jam from them. Most people say they are poisonous, but I do not think this is true. Maybe people with allergies could have been poisoned if they ate them. My grandmother has been eating half a kilo in one sitting since she was little. Of course, diarrhea is definitely guaranteed for those whose bodies are not used to it. I also do not recommend it for chicks 2 months old and younger. If they eat them, they may have diarrhea, which means death. The mother of the chicks does not take them up the tree and feed them anyway. Chickens love things that fall to the ground. But they know themselves. According to my observations, they consume a dozen or less fruits in just one day. In fact, the roosters are the first to try. Then they call the hens.