1046 
ANIMAL RESOURCES 
and we've just had a very difficult time coming 
across sheep of that size. 
Dr. Held: Why? 
Dr. Wallin: Supply has been the problem. 
R. B. Shepard, University of Alabama, Bir- 
mingham : Do you cut through the sternum or 
travel through one or the other side of the 
calves ? 
Dr. Wallin: We've been through both 
routes. 
Dr. Shepard: Have you got a good v^ay to 
stabilize the sternum or do you have comments 
about the sternotomy versus a lateral thoraco- 
tomy? 
Dr. Wallin : Dr. Galysh v^^ho is the co-author 
on the paper has been intimately involved in the 
surgical procedures. Perhaps he'd like to re- 
spond to that. 
F. T. Galysh, Travenol Laboratories, Illi- 
nois: I think stabilization of the sternum has , 
been a real problem in our hands. We don't like 
to do median sternotomies in calves. The earlier 
paper has alluded to the infection problem. This 
has been very real in our hands also in those 
calves that have undergone median sternotomy. 
P. C. Smiley, Physics International, Califor- j 
nia : Do you prefer the Holstein ? ^ 
Dr. Wallin : Again I think it is a matter of 
availability and a preference in fact over some 
of the beef breeds which we had experience 
with earlier. In the midwest, certainly, the Hol- 
stein or Holstein type cattle are the most com- j 
mon dairy breeds, and for a variety of reasons, i 
we have avoided the stocky build of the beef j 
calf. I 
