Blog posts of '2017' 'December'

For the last 20-plus years, the industry standard for finishing houses has been some variation of a total slat, double-curtain building design. This style of construction utilized lower cost curtain construction on the sidewalls.   As the design migrated north, some of the earliest adaptions to the buildings consisted of adding insulation to the sidewalls. Producers and builders used insulated or heavier weight curtains, removable bubble foil insulation and even eliminated the north curtain altogether replacing it with a solid insulated wall.   A growing trend in new construction has seen a move away from curtain-sided finishing buildings. Several key factors have driven this movement to totally enclosed structures for finishing hogs.

    Heat savings. Replacing the sidewall curtains with high R-value insulated, solid wall can significantly reduce the amount of heat needed when starting pigs. A simple heat loss comparison of a 200-foot exterior wall pointed to savings of up to 0.25 gallons of propane per hour. This building loss calculation also did not take into account the amount of heat needed to counter cold air leaks through tears or holes in the curtain or infiltration around the edges.

Improved minimum ventilation.
The winter fans create a negative pressure inside the building drawing air from outside. Since even the best installed and maintained curtains are not airtight, cold outside air leaks in from around the curtains instead of entering through the ceiling inlets. Solid sidewalls eliminate curtain air leaks, so all the air comes through the ceiling inlets at a higher velocity. This cold, high-velocity air mixes with warmer room air near the ceiling before it swirls to pig level.  

Reduced maintenance.
With no curtains, hardware or curtain machines to repair or replace, producers can eliminate the annual fall maintenance program saving time and money during the busy harvest season.  

Improvements in fail-safe protection. Sidewall curtains provide fail-safe protection against power outages. A simple curtain drop device connected to the winch handle allows the curtains to drop down to prevent suffocation.   In practice, this system many times does not function as intended because of poor repair and maintenance. Advanced alarm system technology linked to environmental controls alert barn operators almost immediately of power outages or drastic room temperature changes.

Several producers have remodeled existing curtain-sided buildings into solid sidewalls after seeing the benefits.   The conversion is relatively straightforward with extra 2x6 studs added to the sidewall framing, exterior steel siding, 6-inch batt insulation and interior wall covering of plywood, Fiber Reinforced Plastic, poly board or metal siding.  For interior panels in animal contact areas, do not allow the panel edge to extend over the concrete wall and cover all panel joints with aluminum batten strips.    

It is a standard production practice to use water driven medicators to administer medications, vaccines, and supplements to livestock and poultry.  With good water quality and routine maintenance, virtually all brands of water driven medicators do an excellent job of accurately delivering the correct dosages.  

Poor water quality causes most of the problems producers experience when using this type of injection equipment.   Water with high levels of dissolved chemicals (hard water) and impurities like sand and scale, can cause damage to seals, plungers, and pistons. Also, as some producers have moved to ABF production, chemicals used for water treatment have proved particularly corrosive to the moving parts of water driven medicators.

Electric pumps used in the water treatment industry have proved effective in overcoming the problems with water quality and harsh chemicals.   Drinking water does not travel through the pump; instead, it receives a signal from an in-line water meter. Based on the water flow passing through the meter, the electric pump injects accurate dosages from the stock tank directly into the water line.  

The primary electric medicator currently in use for livestock and poultry production is the peristaltic pump. Peristaltic pumps use a roller device to squeeze stock solution through a hose or tube. The primary wear part is inexpensive tube kit that is easy to replace. Peristaltic pumps are excellent at delivering accurate dosages at low water flows, typical when starting new flock or group.  See Stennicator

Another type of electric pump uses a molded PTFE or Teflon diaphragm to dose chemicals. The Teflon diaphragm features excellent chemical resistance. Wear is virtually nonexistent on this part as the pumping movement amounts to only about 1/8" of flex. Diaphragm pumps handle low flows exceptionally well and also provide accurate metering at higher flows typically found at the end of a grow out period.  

The direct injection design of electric medicators allows operation in poor water conditions that damage water driven medicators.  

Adding a water-based medicator adds flexibility to your management options.   It's easier and quicker to switch medications and supplements in the water compared to using feed additives. Also, sick animals will drink water even if they aren't eating well.  

Most show pig producers with more than a few pigs have automated their water supply by installing a water line and either nipple or cup drinkers in each pen.   Plumbing a medicator into this water system is relatively straightforward.   Start by installing a ball valve in the PVC pipe and plumbing a by-pass to direct incoming water through the medicator. The by-pass can be constructed of PVC pipe with ball valves, or an alternative method uses hose bibs with 5/8" drinker hose.   This alternative method is ideal for use in multiple locations, simply remove the hoses, detach the unit from the wall and move the whole assembly to the next barn.       To use the medicator, dry powders or liquid concentrates are dissolved in water (according to package directions) creating a stock solution. The suction hose from the medicator is placed in the stock tank (typically a 5-gallon bucket). The water flow from the drinking system passes through the medicator, drawing solution from the stock tank and mixing the stock solution into the pig’s drinking water.  

The Dosatron DM11F medicator is one of the best choices for use with show pig herds. Because it is water powered, it requires no electricity to use, making it easy to move.   The DM11F automatically compensates for changing water flows and pressures providing consistent, repeatable dosing.   Its diaphragm water motor also enables the DM11F to operate at water flows as low as .02 gallons per minute. The ability to accurately dose at low flow rates is vital with young pigs and smaller group sizes.   To learn more about the DM11F medicator click here