Ababakri R., Riasi A., Fathi M. H., Naeemipoor H. and Khorsandi S. 2012. The effect of spearmint sativum essence added to starter diet on ruminal fermentation, weaning age and performance of Holstein calves. Animal Science Research Journal, 22: 141-154.
Agarwal N., Shekhar C., Kumar R., Chaudhary L. and Kamra D. 2009. Effect of peppermint (Mentha piperita) oil on in vitro methanogenesis and fermentation of feed with buffalo rumen liquor. Animal Feed Science and Technology, 148: 321-327.
AOAC. 2000. Official Methods of Analysis. (17th ed.) Association of Official Analytical Chemists. Washington D. C.
Benchaar C., Calsamiglia S., Chaves A., Fraser G., Colombatto D., McAllister T. and Beauchemin K. 2008. A review of plant-derived essential oils in ruminant nutrition and production. Animal Feed Science and Technology, 145: 209-228.
Benchaar C., Petit H., Berthiaume R., Ouellet D., Chiquette J. and Chouinard P. 2007. Effects of essential oils on digestion, ruminal fermentation, rumen microbial populations, milk production, and milk composition in dairy cows fed alfalfa silage or corn silage. Journal of Dairy Science, 90: 886-897.
Busquet M., Calsamiglia S., Ferret A., Cardozo P. and Kamel C. 2005a. Effects of cinnamaldehyde and garlic oil on rumen microbial fermentation in a dual flow continuous culture. Journal of Dairy Science, 88: 2508-2516.
Busquet M., Calsamiglia S., Ferret A., Carro M. and Kamel C. 2005b. Effect of garlic oil and four of its compounds on rumen microbial fermentation. Journal of Dairy Science, 88: 4393-4404.
Calsamiglia S., Busquet, M., Cardozo, P.W., Castillejos, L., and Ferret, A. 2007. Invited review: Essential oils as modifiers of rumen microbial fermentation. J Dairy Sci. 90(6): 2580-2595.
Carlotto S. B., Olivo C. J., Viégas J., Stiles D. A., Gabbi A. M., Brustolin K. D., Charão P. S., Rossarolla G., Ziech M. and Pereira L. E. T. 2007. Performance and behavior of dairy calves fed diets containing milk and citric flavor agents. Ciência e Agrotecnologia, 31: 889-895.
Evans J. D. and Martin S. A. 2000. Effects of Thymol on ruminal microorganisms. Current Microbiology, 41: 336-340.
Fathi M., Riasi A. and Allahresani A. 2009. The effect of vanilla flavoured calf starter on performance of Holstein calves. Journal of Animal and Feed Sciences, 18: 412-419.
Franz C., Baser K. H. C. and Windisch W. 2010. Essential oils and aromatic plants in animal feeding–a European perspective. A review. Flavour and Fragrance Journal, 25: 327-340.
Godfrey N. W. 1961. The functional development of the calf II. Development of rumen function in the calf. The Journal of Agricultural Science, 57: 177-183.
Jeshari M., Riasi A., Mahdavi A. H., Khorvash M. and Ahmadi F. 2016. Effect of essential oils and distillation residues blends on growth performance and blood metabolites of Holstein calves weaned gradually or abruptly. Livestock Science, 185: 117-122.
Lesmeister K. and Heinrichs A. 2004. Effects of corn processing on growth characteristics, rumen development, and rumen parameters in neonatal dairy calves. Journal of Dairy Science, 87: 3439-3450.
Meriden Animal Health. 2009. Orego-Stim promotes a balanced intestinal microbiota. Tech Bulletin. Edition 18. available on: http://www.meriden-ah.com/products/orego-stim.
Meyer N. F., Erickson G. E., Klopfenstein T. J., Greenquist M. A., Willams P. and Losa R. 2007. Effect of CRINA RUMINANTS AF, a mixture of essential oil compounds on finishing beef steer performance. Nebraska beef cattle reports: 80.
Osborne V., Odongo N., Edwards A. and McBride B. 2007. Effects of photoperiod and glucose-supplemented drinking water on the performance of dairy calves. Journal of Dairy Science, 90: 5199-5207.
Platel K. and Srinivasan K. 2004. Digestive stimulant action of spices: a myth or reality? Indian Journal of Medical Research, 119: 167-179.
Santos F. H. R., De Paula M. R., Lezier D., Silva J. T., Santos G. and Bittar C. M. M. 2015. Essential oils for dairy calves: effects on performance, scours, rumen fermentation and intestinal fauna. Animal Journal, 9: 958-965.
SAS. 2002. Version 9.1 SAS/STAT User’s Guide. Cary, NC, USA: Statistical Analysis Systems Institute.
Seyedalmoosavi S. M. M., Riasi A., Fathi M. H. and Farhangfar H. 2013. Effect of water delivery system and dill (Anethum graveolens) essence added to starter feed on weaning age, rumen fermentative condition and performance of Holstein calves. Animal Science Researches, 23: 41-55.
Soltan M. 2009. Effect of essential oils supplementation on growth performance, nutrient digestibility, health condition of Holstein male calves during pre-and post-weaning periods. Pakistan Journal of Nutrition, 8: 642-652.
Tatsuoka N., Hara K., Mikuni K., Hara K., Hashimoto H. and Itabashi H. 2008. Effects of the essential oil cyclodextrin complexes on ruminal methane production in vitro. Journal of Animal Science, 79: 68-75.
Thomas L., Wright T., Formusiak A., Cant J. and Osborne V. 2007. Use of flavored drinking water in calves and lactating dairy cattle. Journal of Dairy Science, 90: 3831-3837.
Van Keulen J. and Young B. 1977. Evaluation of acid-insoluble ash as a natural marker in ruminant digestibility studies. Journal of Animal Science, 44(2): 282.
Vakili A. R., Khorrami B., Danesh Mesgaran M. and Parand E. 2013. The effects of Thyme and Cinnamon essential oils on performance, rumen fermentation and blood metabolites in Holstein calves consuming high concentrate diet. Asian Australasian Journal of Animal Science, 26: 935-944
Warner R. 1991. Nutritional factors affecting the development of a functional ruminant: a historical perspective. Proceedings Cornell Nutrition Conference, 1-12. Ithaca, NY: Cornell University.