There are many reasons why animal transportation is wrong and stressful for the animals.
First of all, for the slaughter to be efficient and to avoid the risk of meat contamination the animals are starved for maximum of 12 hours before they are killed. During this time broilers don’t have access to food, they only get water. Secondly, the whole process of catching the birds and putting them into the transportation cages is really stressful for them. Moreover, 35% of all injuries happen during loading and unloading the trucks.