These papers might be useful for you.

Sarıözkan, S., Güçlü, B. K., Kara, K., & Gürcan, S. (2013). Comparison of different molting methods and evaluation of the effects of postmolt diets supplemented with humate and carnitine on performance, egg quality, and profitability of laying hens. The Journal of Applied Poultry Research, 22(4), 689-699.

Onbaşılar, E. E., & Erol, H. (2007). Effects of different forced molting methods on postmolt production, corticosterone level, and immune response to sheep red blood cells in laying hens. The Journal of Applied Poultry Research, 16(4), 529-536.

Aygun, A., & Olgun, O. (2010). The Effect of Nonfeed and Feed Withdrawal Molting Methods on Molt and Postmolt Performance in Laying Hens . Trends in Animal and Veterinary Sciences, 1(2), 45-48.

this is the web site of Hyline.

http://www.hyline.com/aspx/resourcelibrary/downloads.aspx

Most of the farmers prefer to keep their hens to late production period for higher egg weight and economic aspects rather than substituting them with new birds. The traditional molting methods including feed removal have been criticized by welfare groups. But the feed removal (fasting) is still the most common method to induce a molt in chicken layers.

These paper is very important including welfare.

Thank you very much for your answers. I'll go though your papers

The goal of interventions is to synchronize the 25-30% body weight loss in the flock. If you do that by fed withdrawl, feeding unpalatable feed, feeding low energy diet the target of synchronized weight loss is the same. Most of the recent research is over methods of achieving weight loss and comparing outcomes in the subsequent egg production; how even is the synchronization and re-initiation of lay, do 100% of the birds moult,  and the quality of the subsequent production. The SE problem associated with the method of weight loss induction should also be a significant concern when choosing management practice.

1.    Ricke SE, Dunkley CS, Durant JA. A review on development of novel strategies for controlling Salmonella Enteritidis colonization of laying hens: Fiber based moult diets. Poult Sci 2013;92:502-525.

2.    Patwardhan D, King A. Review: feed withdrawal and non feed withdrawal moult. World Poult Sci J 2011;67:253-268.

3.    Koch JM, Lay DC Jr. McMunn KA, Moritz JS, Wilson ME. Motivation of hens to obtain feed during a molt induced by either feed withdrawal, wheat middlings or melegestrol acetate. Poult Sci 2007;86:614-620.

4.    Bland K, Utterbeck P, Koelkebeck K, Parsons C. Evaluation of various feeding sources of distillers dried grains with soluables in non-feed-withdrawl moult programs for laying hens. Poult Sci 2014;93:1421-1427.

5.    Dickey ER, Bregendhal K, Stalder K, Fitzegerald R, Johnson AK. Effects of premopult calcium and low-energy moult program on laying hen behavior and heterophil-to-lymphocyte ratios. Poult Sci 2010;89:2317-2315.

6.    Kahn RU, Nikousefat Z, Javdai M, Tufarelli V, Laudadio V. Zink-induced moulting: production and physiology. World Poult Sci J 2011;67:497-505.

If you are considering animal welfare then none. By its nature forced moulting is an extreme stress for the birds and has a number of detrimental effects.

Dear Gayani

When we talk about welfare , that is reverse to force molting , because it is not natural behaviour and be stress factor on the birds in all choices.

Best Regards

This article is very useful for you:

The decision of using a forced molting program depends on several factors, such as: replacement pullet price, end-of-lay layer meat price, flock egg production, egg quality and weight expected for the second cycle, egg price, feed cost, maximum facility use, planned replacement programs, and employed molting method (Garcia, 2001).

The forced molting methods conventionally used for commercial layers can be classified in three groups: use of drugs, such as progesterone and chlormadinone; nutritional, which change the concentration of determined ions in the feed, such as calcium and phosphorus, sodium and potassium, iodine or zinc; and a wide range of management methods, which are the most frequently used (Castelo Llobet et al., 1989).

Several methods have been studied in the last three decades, but fasting, i.e., withdrawal of feed and/or water, along with artificial lighting suspension, is the most commonly applied (Wakeling, 1977; Shippee et al., 1979; Stevenson & Jackson, 1984; Berry & Brake, 1985; Harms, 1991), as it is easy to apply and promotes good results. However, although during natural molting feed intake, activity, and body weight are reduced, the method of extended feed withdrawal is considered harmful to bird welfare.

You can to search in this link:

https://www.backyardchickencoops.com.au/help-hens-moulting-season/

Please, read the following article link :

https://academic.oup.com/ps/article/86/6/1260/1579938

Good Luck

Thank you very much

Gayani Herath Khalid Hassan Yasser Jamal Jameel Zeynab Shahvandi