The Rural Voice, 1994-08, Page 49NEED A SPECIAL PAINT?
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Wayne Cook
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R.R.2 Zurich, Ont.
NOM 2T0
Advice
Hot pigs and wet air!
High humidity and air temperatures
affect most classes of swine in similar
ways, including irritable and aggressive
behaviour, and reduced mobility to the
point where they will stop eating, totally
disregarding any pen or housekeeping
habits they may have leamed. The pork
industry in other parts of the world has
worked with the heat humidity problem
for a number of years, and there are
things that can be done to reduce stress
on the animals and improve
performance.
Adding water is quick, fast and
effective, but only enough to wet the
outside of the animal without runoff.
The water takes in heat from the animal
and evaporates into the air, cooling the
pig in the process. In farrowing crates,
sows can be wet with drip lines, fog
nozzles, hoses and nozzles or small
hand operated sprayers.
In finishing operations, fog nozzles
or sprinkler systems on timers provide
quick and effective relief for the
animals. If manure volumes are a
concern, timers do a good job of
reducing water use to get the job done.
Fan blades and shutters should be
checked to ensure they are clean and
working well. The size of the
equipment should match the number of
animals in the bam. Newer buildings
were generally built with greater fan
sizes and capacities and are giving
better animal performance. In hotter
climates, extra fans are added in periods
of hot weather, even in opcn, fully
naturally ventilated buildings, and do
affect animal performance.
The barn load is another factor that
can be changed. At the present time,
with heavier shipping weights,barns
may be holding up to two weeks more
inventory. In hot humid weather market
weight animals on partial slats should
have very close to 10 square feet per
animal. Performance is much better
with one less pig in a pen instead of one
too many.
The fact that we have to deal with
extreme summer weather only
occasionally makes it seem like a
serious problem to us. In pork
producing areas where it is a known and
regular condition, planning and
experience have shown that it can be
well managed.°
by Ed Barrie
Swine Advisor
AUGUST 1994 45