These two species of poultry will live together. However, the success of this mixed flocking is dependent on some factors. One of these factors is the absence of blackhead disease amongst the chickens.
Turkeys are generally calmer than chickens. So, you do not have to be as concerned that these two bird species squabble.
You can keep chickens and turkeys together. However, you must be wary of the disease called Histomoniasis. Histomoniasis may also be called blackhead disease. It is a disease caused by a parasite known as Histomonas meleagridis
To avoid the blackhead disease issue, contact your state or local poultry veterinarian. The vet will let you know if there is blackhead disease in your area.
Depending on your reason for keeping birds, their diets may differ. Since turkeys are usually bred for meat, their feeds are generally high in protein to sustain growth and make them heavier.