a1 Agricultural Research Council, Institute of Animal Physiology, Babraham, Cambridge
1. Acid-base changes were observed in the blood of some sheep after turning them out to lush spring grass.
2. These changes were observed in animals previously fed a diet of hay plus concentrates. No changes were found in animals previously fed hay alone.
3. Reasons are given for believing the acidosis observed was a consequence of feeding on lush pasture, and not a consequence of the exercise and excitement involved in rounding up sheep for sampling.
(Received October 18 1958)
p1 Faculty of Rural Science, University of New England, Armidale, New South Wales, Australia.
p2 University of Nottingham, School of Agriculture, Sutton Bonington, near Loughborough.