The bulk of a chicken's diet should be a balanced poultry feed. The type of feed depends on the age of the chicken. The feed types are typically labeled as chick, grower and layer and come in a pelleted or crumble form. Your flock will determine which feed they prefer.
Chickens also need two types of supplements: grit and calcium. Grit consists of small stones and rocks. Chickens eat grit and store it in their gizzards to help them digest what they eat. If your chickens are allowed to free range, they will find enough grit for their needs. If not, you will have to provide commercial grit.
"Chickens also need supplemental calcium to ensure strong eggshells," Lisa says. You can purchase crushed commercial oyster shells to feed them. Another option is to save the eggshells from your flock and crush the eggshells to feed back to your hens.
You can also give them natural supplements. "Giving your chickens natural supplements such as dried herbs, sea kelp, probiotics, brewers yeast and garlic can contribute to your flock's immune, digestive and respiratory health," Lisa advises.
Chickens also need access to cool fresh water all day long. "Adding a tablespoon of apple cider vinegar to the water a few times a week helps balance the pH, prevents algae from forming in the water and improves digestive health for chickens," Lisa says.