Heat stress - Putting Ventilation to the TEST

photo: golearngeo.wordpress.com

Keeping Cool Takes Work 

When we consider cooling birds, most producers first turn to a fan for help.  Fans do a great job of reducing temperature of a poultry house by using convection to help remove heat that is surrounding the bird.  Birds use the evaporation of water from their respiratory system to help cool their bodies.  Larger comb varieties also cool themselves by circulating blood through their comb and wattles.  Testing the air by using a hygrometer to test temperature depression using ventilation is a simple method to determine the possible effectiveness of using fans.

Two things a caretaker should concern themselves during hot weather.  Keeping the fans running efficiently, and running them long enough to help the birds cool properly.

Proper fan maintenance, includes brushing off shutters and doors to keep them free of any dirt and debris.  This also includes the brushing off of fan blades so that they will "Bite" the air properly to move air through the fan.  Do not attempt to brush off a fan without stopping electrical power to the unit.  Do not forget to brush off the motor, as even sealed motors can cool better when not covered in dust!  While brushing off fans, check belts and pulleys for wear and replace these as soon as possible.  Worn pulleys will actually slow down a fan reducing the volume of air that can be moved.

Lastly, fans should run long enough to bring house temps down long enough for the birds to rest from heat stress.  Consider overshooting house temp by allowing a house to cool to 70 degrees long enough for birds to eat and digest their food.  If done during the cool part of the day, egg production and growth in meat birds should continue even on the weeks of high daily temperatures.

Pastured Poultry & Rotational Grazing

Photo: Peggy Sellers - Perdue Univ.

Pasture Quality & Condition is Important 

I had the chance to visit several pastured poultry farms this week and I was reminded of how this was done in the early 1920's.  Birds were routinely pastured to take advantage of sunlight (vit. D) and the natural grasses they ate.  What is so different between operations of today and yesteryear is that we tend to restrict our birds in one area as we graze.  This creates a host of problems as the grass becomes over-run by the birds and heavy loads of manure accumulate.

Rotational grazing should be just that.  Moving the birds frequently to keep grass in good condition and to help spread out manure loads in a field being grazed.  You should move birds before all the grasses they are bedding on become stomped down.  Supplemental feeding is also important at this time to make sure the birds are receiving all essential nutrients that they are not getting from the grasses they are feeding on.  Clover for example has a high protein content than most grass species.  Therefore the corn in a full feed poultry diet will help compensate and provide the energy component of the birds daily nutritional needs.

By rotation of the pasture, the sun can help sanitize the ground last occupied by the birds.  With frequent rotation, the pastures can recover more quickly and in turn provide more forage opportunities for the birds.  Your pasture after the move of the birds will tell how well you are doing on your pasture management program.

Foot Health in Poultry

Photo: NC Extension

Putting your best foot forward                              

Like all farm animals being able to move is very important.  Over the years, foot health has gained interest in meat birds and breeding stock, since if a bird can't walk it can't eat and a dangerous spiral starts if not corrected.

It is important to note that moisture plays a large part in a bird's foot health.  Litter and floor conditions that are too wet begin to erode the skin on the foot pad and can lead to inflammation (bumblefoot) and lameness.  Moisture created by the birds along with water spillage if not managed can create lameness in a flock.  You can test litter moisture by picking up a large handful of litter and squeezing it.  Excessively wet litter will ball up or drip water, and feel sticky to touch.  Add additional litter if possible or stir existing litter to help promote drying.  Adjust ventilation rates to help remove moisture from the house and keep the litter dry.

Remember that litter floors are the environment that the birds live in, including walking and standing.  The litter volumes on floors should be adequate to supply a soft walking surface for the bird.  It also should be deep enough for water absorption from the flock.  All other associated flooring, including slats, perches and other resting devices need to be in good condition to eliminate any foot pad injury.   Good housekeeping of the floor will aid in keeping the flock in good step.

Old McDonald in a New Light

We are not in Kansas anymore...


I spent the week at the PA farm show this month. This year PennAg Industries put together a live animal exhibit called "Today's Agriculture". Inside the commercial building were animals depicted in their commercial enclosures for their particular needs. Almost to the person, most were very impressed with how all the needs of the animal were being cared for. Most were fascinated that we can keep animals in confinement and yet have them flourish if given the proper environment.

What this great exhibit reminded me of was that we sometimes hang onto old ideas, like Ol' McDonald's farm. Old McDonald had to become more efficient and produce more product as margins for his product decreased. It is amazing to think of all the developments that have continued to make our food the most plentiful and safest in the world. The people who went through that display saw firsthand how their food is produced. We should do more to promote that dialog. One such place is Farmers Feed Us that discusses how some of our foods are grown. Take a look and see. picture credit: Sarah Weeda