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The Rural Voice, 1998-04, Page 36at his farm, assisted by Bergsma. The farm uses mainly Bodmin boars with Duroc, York, Landracc and Hampshire/Duroc breeds, and uses artificial insemination. Most of the females arc selected from their own herd, mostly long and large frame York/Landrace backcross Fls and F2s. Vanden Heuvel emphasized the value of building immunity in his herd, saying that choosing gilts from within his own herd means they will have developed immunity to diseases on the farm. They do not use shower - in, shower -out practices on their own farrn and they use a three-week weaning age to pass on the sows' immunity to the piglets. "We reap the benefitsfrom this throughout the herd," he said. The farm keeps many older sows, pointing out sows with five parities or more may have more stillbom pigs but their total pigs produced may still be high. "We can get this longevity because the sows have a high immunity level to the hugs we have at the farm. If the sows stay fit during their life they will farrow easier." Bergsma, who oversees the farm's 256 -crate farrowing barn with her sister Joan, went through the procedures she uses to get maximum results. For instance, she checks on the comfort of baby pigs by observing their lying patterns and uses bran on the creep mat to keep it dry and warm, and working to prevent drafts. With fostering, she tries to ensure that liners are even and takes into consideration the age of the sow and her history. She uses a cut-off time of five days to add or subtract pigs from a litter. She starts creep feeding at 10 days, top dressing with Ferro Treat. Stephen Thom- son, who operates two 2000 -head nursery barns in Oxford County smells hot, such as fan bearings or heaters that smell smoky from too much dust. Regular maintenance can save money and prevent inconvenient breakdowns, even fires. Keep spare parts on hand to help save time and animal comfort. Smell for foul odours in young pigs' pens that may indicate early stages of scours. If the air is heavy smelling and hard The pigs' demeanor will tell you if they're comfortable, speakers said. said the best advice he can give is to use your senses. When you enter the barn, pay attention to anything that QUALITY FLOORING FOR FARROWING BARNS V -bar Flooring • 2 ft. to 10 ft. lengths • 2 ft. widths • knurled or smooth bars • galvanized • self supporting Vandepas Welding R.R. 2, Kenilworth, ON 519-848-6537 Call for the dealer nearest you! 32 THE RURAL VOICE to breathe, then the fan speed is too low. Too much humidity and dust will lead to lung problems in young pigs and pneu-monia will set in, causing slow growth or death. Thomson said he likes relative humidity to be 50-65 per cent. "Smell the feed each time you get a new batch deliver -ed," he advised. Any foul smells could be caused by moulds or rancid ingredients. Also, different flavouring ingredients could tip you off to the wrong feed delivered to the wrong bin. "Any of these could be a disaster to a fragile baby pig." Listening to odd or out of place sounds can quickly identify problems, Thomson advised. Fan bearings that squeal or grind or a feed auger that won't shut off or heaters that run all the time can indicate problems. "Listen to your pigs. They can tell you a lot about how they are feeling," he said. Unhappy pigs will be squealing a lot and will be restless and agitated when they should be content. "Listen to their breathing. If you hear a laboured or wheezing breath, then take action by treating with an appropriate medication and adjust the ventilation," Thomson said. Pigs that are stressed squeal distinctly. Overcrowding may cause stress. Allow three square feet per pig in the nursery. If there are signs of stress, be prepared to remove the pig if need be and treat it. Try to return the pig as quickly as possible so it will be accepted back into the