Shell Grit is an important part of a chickens diet as it aids in digestion and also helps with the egg shell production. If you egg shells are soft add some extra calcium to the feed
Chickens usually start laying at about 18 weeks old, eggs are smaller when they start to lay and get bigger as the chicken gets older. After three to four years the egg production gets less the older they get.
it is advisable to worm your chicken every three months to maintain good health and good egg production.
Chickens often get lice and they should be treated with a de-licer such as Pestene powder