Agricultural and Food Research Council. 1992. Technical Committee on Responses to Nutrients. Report No. 9. Nutritive requirements of ruminant animals: protein. Nutrition Abstracts and Reviews B
Agricultural Research Council. 1984. The Nutrient Requirements of Ruminant Livestock. Supplement No.1. Commonwealth Agricultural Bureaux, Slough, UK.
1962. The herbage intake of grazing sheep in relation to pasture availability. Proceedings of the Australian Society of Animal Production
Beever, D.E. and Siddons, R.C.
1986. Digestion and metabolism in the grazing ruminant. In: Control of Digestion and Metabolism in Ruminants, pp. 479–496. Prentice-Hall.
Champion, R.A., Rutter, S.M. and Penning, P.D.
1997. An automatic system to monitor lying, standing and walking behaviour of grazing animals. Applied Animal Behaviour Science
Chen, X.B., Ørskov, E.R. and Hovell, F.D.DeB.
1990. Excretion of purine derivatives by ruminants: endogenous excretion, differences between cattle and sheep. British Journal of Nutrition
Dewhurst, R.J. and Webster, A.J.F. 1992. Effects of diet, level of intake, sodium bicarbonate and monensin on urinary allantoin excretion in sheep. British Journal of Nutrition
Dewhurst, R.J., Theobald, V.J., Neville, M.A., Miles, S. and Evans, R.T.
1996. Relationship between the excretion of allantoin in urine and milk of dairy cows. Proceedings of the British Society of Animal Science, pp.89.
Dewhurst, R.J., Davies, D.R. and Merry, R.J.
2000. Microbial protein supply from the rumen. Animal Feed Science and Technology
Tweed, S.N., Neville, M.A. and Evans, R.T.
2001a. Overestimation of microbial synthesis using techniques based on the flow of purine bases to the duodenum. Journal of Dairy Science (submitted).
Dewhurst, R.J., Evans, R.T., Mottram, T.T., Španel, P. and Smith, D.
2001b. Assessment of rumen processes by selected-ion- flow-tube mass spectrometric analysis of rumen gases. Journal of Dairy Science
Geishauser, T., Leslie, K., Tenhag, J. and Bashiri, A.
2000. Evaluation of eight cow-side ketone tests in milk for detection of subclinical ketosis in dairy cows. Journal of Dairy Science
Giesecke, D., Ehrentreich, L., Stangassinger, M. and Ahrens, F.
1994. Mammary and renal excretion of purine metabolites in relation to energy intake and milk yield in dairy cows. Journal of Dairy Science
Gonda, H.L. and Lindberg, J.E.
1997. Effect of diet on milk allantoin and its relationship with urinary allantoin in dairy cows. Journal of Dairy Science
Haman, J., and Krömker, V.
1997. Potential of specific milk composition variables for cow health management. Livestock Production Science
Laca, E.A., Ungar, E.D. and Demment, M.W.
1994. Mechanisms of handling time and intake rate of a large mammalian grazer. Applied Animal Behaviour Science
Laca, E.A. and WallisdeVries, M.F.
2000. Acoustic measurement of intake and grazing behaviour in cattle. Grass and Forage Science
Lee, S.S., Chang, M.B., Scollan, N.D., Merry, R.J., Dhanoa, M.S., Hobbs, P.J., Theobald, V.J. and Dewhurst, R.J.
1999. The fatty acid composition of solid- and liquid-associated rumen bacteria isolated from cows. Proceedings of the British Society of Animal Science, pp30.
MacRae, J.C. and Ulyatt, M.J.
1974. Quantitative digestion of fresh herbage by sheep. II. The sites of digestion of some nitrogenous constituents. Journal of Agricultural Science
Mottram, T.T., Whay, H.R., Hobbs, P., Richards, P., Short, L. and Hartung, J.
1999. Automatic cow breath sampling: an experiment to measure emissions of polluting compounds in the breath of unrestrained dairy cows. In: Conference: Construction, Engineering and Environment in Livestock Farming. eds: Landtechnik, Weihenstephan, Germany. pp. 49–50.
Narasimhan, L.R., Goodman, W. and Patel, C.K.N.
2001. Correlation of breath ammonia with blood urea nitrogen and creatinine during hemodialysis. Proceedings of the National Academy of Sciences
1969. Evaluation of a simple device for measuring the time animals spend grazing. Irish Journal of Agricultural Research
Payne, J.M., Dew, S.M., Manston, R. and Faulks, M.
1970. The use of metabolic profile tests in dairy herds. Veterinary Record
1983. A technique to record automatically some aspects of grazing and ruminating behaviour in sheep. Grass and Forage Science
Penning, P.D., Steel, G.L. and Johnson, R.H.
1984. Further development and use of an automatic recording system in sheep grazing studies. Grass and Forage Science
Rook, A.J., Gill, M., Willink, R.D. and Lister, S.J.
1991. Prediction of voluntary intake of grass silages by lactating cows offered concentrates at a flat rate. Animal Production
Russell, J.B., O'Connor, J.D., Fox, D.G., Van Soest, P.J. and Sniffen, C.J.
1992. A net carbohydrate and protein system for evaluating cattle diets I. Ruminal fermentation. Journal of Animal Science
1999. Developments in the use of micro-computer based methods for the automatic recording of grazing behaviour. In: Nutritional Ecology of Herbivores. Satellite Symposium: Emerging Techniques for Studying the Nutrition of Free Ranging Herbivores. Editors: Dove, H. and Coleman, S.W.. April 10-11, 1999. San Antonio, TX. (CD-ROM).
2000. Graze: A program to analyze recordings of the jaw movements of ruminants. Behaviour Research Methods, Instruments and Computers
Rutter, S.M., Champion, R.A. and Penning, P.D.
1997a. An automatic system to record foraging behaviour in free-ranging ruminants. Applied Animal Behaviour Science
Rutter, S.M., Beresford, N.A. and Roberts, G.
1997b. Use of GPS to identify the grazing areas of hill sheep. Computers and Electronics in Agriculture
2000. Estimation of microbial protein supply in ruminant animals based on renal and mammary purine metabolite excreation. A review. Journal of Animal and Feed Sciences
Simpson, J.M., McCracken, V.J., White, B.A., Gaskins, H.R. and Mackie, R.I.
1999. Application of denaturant gradient gel electrophoresis for the analysis of porcine gastrointestinal microbiota. Journal of Microbiological Methods
Smith, D. and Španel, P.
1996. Application of ion chemistry and the SIFT technique to the quantitative analysis of trace gases in air on breath. International Reviews in Physical Chemistry
1997. Design and interpretation of nutrient digestion studies. Journal of Animal Science
Tolkamp, B.J., Dewhurst, R.J., Friggens, N.C., Kyriazakis, I., Veerkamp, R.F. and Oldham, J.D.
1998. Diet choice by dairy cows. 1. Selection of feed protein content during the first half of lactation. Journal of Dairy Science
Topps, J.H. and Elliott, R.C.
1965. Relationship between concentrations of ruminal nucleic acids and excretion of purine derivatives by sheep. Nature
Van Niekerk, B.D.H., Bensadoun, A., Paladines, O.L. and Reid, J.T.
1963. A study of some of the conditions affecting the rate of excretion and stability of creatinine in sheep urine. Journal of Nutrition