[AOAC (2005). Association of Official Analytical Chemists. Official methods of analysis, 18th Ed., Arlington VA, USA.]Search in Google Scholar
[Barlett K.S., Mc Keith F.K., Vabde Har M.J., Dahl G.H., Drackley J.K. (2006). Growth and body composition of dairy calves fed milk replacer containing different amounts of protein at two feeding rates. J. Anim. Sci., 84: 1454-1467.]Search in Google Scholar
[Bar-Pelled U., Maltz E., Bruckental I., Folman Y., Kali Y., Gacitua H., Lehrer R. (1995). Relationship between frequent milking or suckling in early lactation and milk production of high producing dairy cows. J. Dairy Sci., 78: 2727-2736.]Search in Google Scholar
[Bilik K. (1999). Effect of different feeding levels of Black-and-White heifer calves during reading on growth and subsequent milk performance (in Polish). Rocz. Nauk. Zoot. Rozpr. hab. IZ, Kraków, 12, 84 pp.]Search in Google Scholar
[Bilik K., Łopuszańska-Rusek M. (2008). Rearing systems of the dairy breed calves on organic farms (in Polish). Post. Nauk Rol., 6: 97-108.]Search in Google Scholar
[Budzyńska M., Weary D.M. (2008). Weaning distress in dairy calves: Effects of alternative weaning procedures. App. Anim. Beh. Sci., 112: 33-39.]Search in Google Scholar
[Council Regulation (EC) No 834/2007 of 28 June 2007 on organic production and labelling of organic products.]Search in Google Scholar
[Dz. U. 2009 nr 116, poz. 975, Ustawa z dnia 25 czerwca 2009 o rolnictwie ekologicznym, uwzględniająca przepisy UE w sprawie produkcji ekologicznej i znakowania produktów ekologicznych, Rozp. Rady (WE) nr 834/2007 z dnia 28 czerwca 2007.]Search in Google Scholar
[Foldager J., Krohn C.C., Mogenson L. (1997). Level of milk for female calves affects their milk production in first lactation. 48th Annual Meeting of the European Association for Animal Production. Danish Institute of Agricultural Sciences Research Centre Foulum, P.O Box 50, DK -8830, Tjele, Denmark, 5 pp.]Search in Google Scholar
[Fröberg S., Gratte E., Svennersten-Sjaunja K., Olsson I., Berg C., Orihuela A., Galina C.S., Garcia B., Lidfors L. (2008). Effect of suckling (restricted suckling) on dairy cows udder health and milk let-down and their calves weight gain, feed intake and behavior. Applied Animal Behaviour Science, 113: 1-14.]Search in Google Scholar
[Gratte E. (2004). Effects of restricted suckling on abnormal behaviour, feed intake and weight gain in dairy calves, and udder health and milk let-down in dairy cows. SLU, Swedish University of Agricultural Sciences Department of Animal Environment and Health Section of Ethology, Section of Ethology, Student report 26 (Summary) p. 1.]Search in Google Scholar
[Hoffman P.C. (1997). Optimum body size of Holstein replacement heifers. J. Anim. Sci., 75: 836-845.]Search in Google Scholar
[Khan M.A., Lee H.J., Lee W.S., Kim H.S., Hur T.Y., Suh G.H., Kang S.J., Choi Y.J. (2007).]Search in Google Scholar
[Structural growth, rumen development, and metabolic and immune response of Holstein male calves fed milk through step-down and conventional methods. J. Dairy Sci., 87: 3376-3387.]Search in Google Scholar
[Kowalski Z. M. (2005). Calves with assessment (in Polish). Hoduj z głową, 4: 22-24.]Search in Google Scholar
[Kristensen T., Struck Pedersen S. (2001). Organic dairy cow feeding with emphasis on Danish conditions. In: Breeding and feeding for animal health and welfare in organic livestock systems.]Search in Google Scholar
[M. Hovi, T. Baars (eds). Proc. Fourth NAHWOA Workshop, Wageningen, 24-27.03.2001, pp. 134-140.]Search in Google Scholar
[Kuleta Z. (1993). Values of hematological and biochemical parameters of health and disease status in animal (in Polish). ART Olsztyn, pp. 6-29.]Search in Google Scholar
[Langhout J., Wagenaar J.P. (2007). Suckling as an alternative rearing system for replacement calves on dairy farms. Proc. 2nd SAFO Workshop, Witzenhausen, Germany, pp. 49-54.]Search in Google Scholar
[Lidfors L., Loberg J., Jung J., Svennersten-Sjaunja K., Berg C. (2002). Sustainable dairy calf management: allowing the calves to suckle. Proc. International Conference on Responding to the Increasing Global Demand for Animal Products, UADY, Mexico, 12-15.11.2002, Brit. Soc. Anim. Sci., pp. 87-97.]Search in Google Scholar
[Moallen U., Werner D., Lehrer H., Katy M., Livshity L., Bruckental I., Shamaz A. (2006). Effect of feeding ad-lib fresh milk or milk replacer during nursing and added protein at pre-puberty period to Holstein heifers on growth rates and production during the first lactation. J. Dairy Sci., 89: M78 (Abstr.).]Search in Google Scholar
[Podgham B.J. (2008). The potential of suckling systems in calf rearing - Dutch research. Organic Broadcaster, issue 15, 1 Jan-Feb, pp. 1-3.]Search in Google Scholar
[Podkówka W. (1974). Nowoczesne metody kiszenia pasz. PWRiL Warszawa, pp. 382-393.]Search in Google Scholar
[Ramin A.G., Daniel R.C.W., Fenwick D.C., Verall R.G. (1996). Serum immunoglobulin concentrations in young calves and their relationship with weight gain, onset of puberty and pelvic area at 15 months of age. Livest. Prod. Sci., 45: 155-162.]Search in Google Scholar
[Skrzypek R. (2002). The importance of colostral immunity in dairy cattle and factors affecting its status (in Polish). Biul. Inf. IZ, 4: 77-91.]Search in Google Scholar
[Sweeney B.C., Rushen J., Weary D.M.,de Passillé A.M. (2010). Duration of weaning, starter intake, and weight gain of dairy calves fed large amounts of milk. J. Dairy Sci., 93: 148-152.]Search in Google Scholar
[Szewczyk A., Walczak J. (2008). Evaluation of calf welfare in different rearing systems (in Polish). Rocz. Nauk. Zoot., 35, 2: 203-215.]Search in Google Scholar
[Ślebodziński A., Brzezi ńska- Ślebodzińska E., Lipczak W., Rosa E. (1982). Simple, clinical test for quantitation of the immunoglobulin complex and total serum proteins in neonates of the farm animals (in Polish). Med. Weter., 8-9: 442-445.]Search in Google Scholar
[Śliwiński B., Furgał-Dzierżuk I., Koreleski J., Brzóska F., Kański J. (2010). Tables of chemical composition and nutrive value of Polish domestic feedstuffs (in Polish). IZ PIB, Kraków, pp. 10-85.]Search in Google Scholar
[Van Soest P.J., Wine R.H., Moore L.A. (1966). Estimation of the true digestibility of forages by the in vitro digestion of cell walls. Proc. Xth Ins. Grassland Congress, Helsinki. Finnish Grassland Association, pp. 438-441.]Search in Google Scholar
[Wagenaar J.P.T.M., Langhout J. (2007). Practical implication of increasing natural living through suckling systems in organic dairy calf rearing. NJAS Wagen. J. Life Sci., 54, 4: 375-386.]Search in Google Scholar
[Wilson L.L., Terosky T.L., Stull C.L., Stricklin W.R. (1999). Effects of individual housing design and size on behavior and stress indicators of special-fed Holstein veal calves. J. Anim. Sci., 44: 1341-1347.]Search in Google Scholar
[Winnicka A. (2007). References values of basic laboratory tests in veterinary medicine (in Polish). SGGW, Warszawa, Wyd. IV, 115 pp. ]Search in Google Scholar
