- Al-Ankari, A.S., Zaki, M.M. and Al-Sultan, S.I., 2004. Use of habek mint (Mentha longifolia) in broiler chicken diets. International Journal of Poultry Science, 3(10): 629-634.
- Alcicek, A., Bozkuez, M. and Cabuk, M., 2003. The effect of an essential oil combination derived from selected herbs growing wild in Turkey on broiler performance. South African Journal of Animal Science, 33(2): 89-94.
- Alzueta, C., Rodriguez, M.L., Ortiz, L.T., Rebole, A. and Trevino, J., 2010. Effects of inulin on growth performance, nutrient digestibility and metabolisable energy in broiler chickens. British Poultry Science, 51(3): 393-398.
- Awad, W.A., Ghareeb, K. and Bohm, J., 2011. Evaluation of the chicory inulin efficacy on ameliorating the intestinal morphology and modulating the intestinal electrophysiological properties in broiler chickens. Journal of Animal Physiology and Animal nutrition, 95(1): 65-72.
- Bahrami, M., Shariatmadari, F. and Karimi Torshizi, M.A., 2011. Effect of dietary extract of Thyme and Peppermint and vitamin E supplementation on immune responses of laying hen in heat stress and content of peroxidation egg during storage. Iranian Journal of Medicinal and Aromatic Plants, 27(2): 326-337.
- Biggs, P., Parsons, C.M. and Fahey, G.C., 2007. Effects of several oligosaccharides on growth performance, nutrient digestibilities, and cecal microbial populations in young chicks. Poultry Science, 86(11): 2327-2336.
- Castellini, C., Cardinalia, R., Rebollar, P., Dal Bosco, G.A., Jimeno, V. and Cossu, M.E., 2007. Feeding fresh chicory (Chicoria intybus) to young rabbits: Performance, development of gastrointestinal tract and immune functions of appendix and peyer’spatch. Animal Feed Science and Technology, 134(1-2): 56-65.
- Cross, D.E., Mcdevitt, R.M., Hillman, K. and Acamovic, T., 2007. The effect of herbs and their associated essential oils on performance, dietary digestibility and gut microflora in chickens from 7 to 28 days of age. British Poultry Science, 48(4): 496-506.
- Flickinger, E.A., Van Loo, J. and Fahey, G.C., 2003. Nutritional responses to the presence of inulinandoligofructose in the diets of domesticated animals: a review. Critical Reviews in Food Science and Nutrition, 43(1): 19-60.
- Garcı´a, V., Catala´-Gregori, P., Herna´ndez, F., Megı´as, M.D. and Madrid, J., 2007. Effect of formic acid and plant extracts on growth, nutrient digestibility, intestine mucosa morphology, and meat yield of broilers. Journal Applied Poultry Research, 16(4): 555-562.
- Herandez, F., Madrir, J. and Garcia, V., 2004. Influence of two plant extracts on broiler performance, digestibility and digestive organ size. Poultry Science, 83(2): 169-174.
- Jamroz, D., Wertelecki, T. Houszka, M. and Kamel, C., 2006. Influence of diet type on the inclusion of plant origin active substances on morphological and histochemical characteristics of the stomach and jejunum walls in chicken. Journal of Animal Physiology and Animal nutrition, 90(5.6): 255-268.
- Kalantar, M., Saki, A.A., Zamani, P. and Aliarabi, H., 2011. Effect of drinking thyme essence on performance, energy and protein efficiency and economical indices of broiler chickens. Pajouhesh & Sazandegi (In Animal Sciences), 92: 59-67.
- Lee, K.W., Everts, H. and Beyen, A.C., 2003. Dietary carvacrol lowers body gain but improves feed conversion in female broiler chickens. Journal Applied Poultry Research, 12(4): 394-399.
- Lee, K.W., Everts, H. and Beyen, A.C., 2004. Essential oils in broiler nutrition. International Journal of Poultry Science, 3(12): 738-752.
- Liu, H.Y., 2008. Influence of chicory feeding on performance and gut development in broilers. M.Sc. Thesis, Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden, 39p.
- Liu, H.Y., Ivarsson, E., Jönsson, L., Holm, L., Lundh, T. and Lindberg, J.E., 2011. Growth performance, digestibility, and gut development of broiler chickens on diets with inclusion of chicory (Cichorium intybus L.). Poultry Science, 90(4): 815-823.
- Manzanillo, E.G., Baucelis, F., Kamel, C., Morales, J., Perez, J.F and Gass, J., 2001. Effects of plant extracts on the performance and lower gut microflora of early weaned piglets. Journal of Animal Science, 1: 473-476.
- Mc Cleary, B. and Prosky, L., 2001. Advanced Dietary Fibre Technology. John Wiley & Sons, New Jersey, 560p.
- Nabizadeh, A., 2012. The effect of inulin on broiler chicken intestinal microflora, gut morphology, and performance. Journal of Animal and Feed Sciences, 21(4): 725-734.
- Nain, S., Renema, R.A., Zuidhof, M.J. and Korver, D.R., 2012. Effect of metabolic efficiency and intestinal morphology on variability in n-3 polyunsaturated fatty acid enrichment of eggs. Poultry Science, 91(4): 888-898.
- Najafi, P. and Torki, M., 2010. Performance, blood metabolites and immuno competaence of broiler chicks fed diets included essentioal oils of medicinal herbs. Journal of Animal and Veterinary Advances, 9(7): 1164-1168.
- Nouri Zadeh, A.S., Mirzapur, I,. Ghasemi, K. and Razavi, M., 2004. Antibacterial effects of peppermint, thyme, licorice, oregano, chamomile and summer savory. Daneshvar Medicine Journal, 11(52):67-70.
- Ocak, N., Erener, F., Burak, A.K., Sungu, M., Altop, A. and Ozmen, A., 2008. Performance of broilers fed diets supplemented with dry peppermint (Mentha piperita L.) or thyme (Thymus vulgaris L.) leaves as growth promoter source. Czech Journal of Animal Science, 53(40): 169-175.
- Ortiz, L.T., Oodriguez, M.L., Alzueta, C., Rebole, A. and Trevino, J., 2009. Effect of inulin on growth performance, intestinal tract sizes, mineral retention and tibial bone mineralization in broiler chickens. British Poultry Science, 50(3): 325-332.
- Pelicano, E.R.L., Souza, P.A., Souza, H.B.A., Figueiredo, D.F., Boiago, M.M., Carvalho, S.R. and Bordon, V.F., 2005. Intestinal Mucosa Development in Broiler Chickens Fed Natural Growth Promoters. Brazilian Journal of Poultry Science, 7(4): 221-229.
- Platel, K. and Srinivasan, K., 2004. Stimulant action of spices: A myth or reality. Indian Journal of Medical Research, 119(5): 167-179.
- Ponte, P. and Rosado, C., 2008. Pasture intake improve the performance and meat sensory attributes of free-range in broilers. Poultry Science, 87(1): 71-79.
- Rebolé, A., Ortiz, L.T., Rodríguez, M.L., Alzueta, C., Treviño, J. and Velasco, S., 2010. Effects of inulin and enzyme complex, individually or in combination, on growth performance, intestinal microflora, cecalfermentation characteristics, and jejunal histomorphology in broiler chickens fed a wheat and barley-based diet. Poultry Science, 89(2): 276-286.
- Rehman, H., Rosenkranz, C., Bohm, J. and Zentek, J., 2007. Dietary inulin affects the morphology but not the sodium-dependent glucose and glutamine transport in the jejunum of broilers. Poultry Science, 86(1): 118-122.
- Ribeiro, A.M.L., Vogt, L.K., Canal, C.W., Cardoso, M., Labres, R.V., Sreack, A.F. and Bessa, M.C., 2007. Effects of prebiotics and probiotics on the colonizationand immune response of broiler chickens challenged with Salmonella Enteritidis. Brazilian Journal of Poultry Science, 9(3): 193-200.
- Safa, S.E.G. and AL-Beitawi, N.A., 2009. The effect of feeding of crushed thyme (Thymus vulgaris) on growth, blood constituents, gastrointestinal tract and carcass characteristics of broiler chickens. The Journal of Poultry Science, 4(2): 100-104.
- Sharifi, S.D., Hasani Khorsandi, S. Khadem, A. and Salehi, A., 2011. The effect of four medicinal plants on performance and concentration of serum lipids in broiler chicks. Journal of Medicinal Plants, 11(8): 83-92.
- Tipu, M.A., Akhtar, M.S., Anjumi, M.I. and Raja, M.L., 2006. New dimension of medicinal plants as animal feed. Pakistan Veterinary Journal, 26(3): 144-148.
- Verdonk, J.M.A.J., Shim, S.B., Leeuwen, P.V. and Verstegen, M.W.A., 2005. Application of inulin-type fructans in animal feed and pet food. British Journal of Nutrition, 93(S1): S125-S138.
- Wang, H.Y., Guo, Y.M. and Shih Jason, C.H. 2008. Effects of dietary supplementation of keratinase on growth performance, nitrogen retention and intestinal morphology of broiler chickens fed diets with soybean and cottonseed meals. Animal Feed Science Technology, 140(3): 376-384.
- Yang, Y., Iji, P.A. and Choct, M., 2007. Effects of different dietary levels of mannanoligosaccharide on growth performance and gut development of broiler chickens. Asian-Australasian Journal of Animal Sciences, 20(7): 1084-1091.
- Yusrizal, C. and Chen, T.C. 2003. Effect of adding chicory fructans in feed on broiler growth performance, serum cholesterol and intestine length. International Journal of Poultry Science, 2(3): 214-219.
- Zeinali, H., Arzani, A., Razmjoo, R. and Rezaee, M.B., 2005. Evaluation of oil compositions of Iranian mints (Mentha ssp.). The Journal of Essential Oil Research, 17(2): 156-159.
)