A lamb showing typical hind leg paralysis, known as

1
A lamb showing typical hind leg paralysis, known
as sway-back
2
A merino lamb that has a harsh, straight coat as
a result of copper deficiency (steely wool)
3
This 6-month old mutton merino-cross lamb is a
good example of an animal that has cobalt
deficiency. Initially the lamb grew well, but in
the spring months of October and November, it
lost condition quickly. The lamb died a few days
after the photograph was taken.
4
The liver of a sheep that died of acute cobalt
deficiency. The accumulation of fat in the liver
resulting from the lack of vitamin B12 gives it
its pale colour.
5
It is characteristic of cobalt and selenium
deficiencies that the lambs lose condition and
deteriorate much faster than the ewes.
6
There were established cobalt and selenium
deficiencies in the bottom flock. Note the good
grazing and apparent good condition of the sheep.
Despite this, many animals, especially lambs,
had not grown properly and were not in good
condition. Sheep in the same area, as in the
picture on the left, that received cobalt and
selenium supplements had a general condition that
is noticeably better.
7
Left is a serious case of bowie. The
characteristics bowed legs are clearly evident.
Above is an advanced case of bowie. The ram will
never recover, even after surgery. Certain
breeds have an inherited tendency to bowie and
the deformity should be sufficient reason to cull
the animals.
8
Left is a relatively mild case of bowie. In the
right picture the forelegs of an animal that has
bowie bend either outwards or inwards, as in this
case.
9
Young animals are affected by a drop in their
blood calcium levels, especially after being
transported for long distances. This lamb is a
typical case of long-distance transport
paralysis the hind legs are stretched out, and
the head and neck are also paralysed.
10
Heavily pregnant ewes are often at risk of
developing milk fever. This ewe is in an advance
stage of the disease. If she is not treated
immediately, she will die within hours.
11
A sheep displaying the typical head-back position
that gave the thiamine-deficient condition the
name of stargazers.