T. Widowski

Publications234
h-index33
Citations3,789
Highly Influential Citations263
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Effects of a subacute ruminal acidosis model on the diet selection of dairy cows.
TLDR
The results suggest that when given a choice of feeds, dairy cows alter their diet selection to attempt to attenuate SARA.
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The effects of weaning at 7, 14 and 28 days on piglet behaviour
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Using time to insensibility and estimated time of death to evaluate a nonpenetrating captive bolt, cervical dislocation, and blunt trauma for on-farm killing of turkeys.
TLDR
Results demonstrated that the Zephyr (discharged twice in immediate succession) and blunt trauma (single hit) were similarly effective at consistently causing immediate insensibility.
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On-farm comparison of keel fracture prevalence and other welfare indicators in conventional cage and floor-housed laying hens in Ontario, Canada.
TLDR
Comparing welfare indicators from alternative housing systems for laying hens is important to ensure that progress is made in improving their well-being, and housing hens in single-tier floor systems increased the flock-level prevalence of keel fractures and resulted in a lower, yet more uniform, BW compared to he chickens in conventional cages under commercial conditions in Ontario.
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Brain and skull lesions resulting from use of percussive bolt, cervical dislocation by stretching, cervical dislocation by crushing and blunt trauma in turkeys
TLDR
Percussive bolt shooting and blunt trauma most likely caused death by directly disrupting brain function, whereas neck stretching and neck crushing probably resulted in death from cerebral hypoxia and ischaemia.
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The effect of dietary alterations during rearing on growth, productivity, and behavior in broiler breeder females.
TLDR
Overall, the feed-grade diet appeared most effective at reducing hunger-related behavior, and the control diet appeared the least effective; there was little conclusive evidence to show that daily feeding was more effective at reduced hunger.
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Male broiler breeder fowl display high levels of aggression toward females.
TLDR
In conclusion, broiler breeder males display aberrant sexual behavior and extremely high levels of aggression, which are associated with genetic differences, not feed restriction.
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Effects of resistance to milk flow and the provision of hay on nonnutritive sucking by dairy calves.
TLDR
Reduction in flow rate when calves drink milk through a teat and the provision of hay after the meal can reduce the incidence of nonnutritive sucking following the meal and may help to limit cross-sucking in group housing systems.
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Effect of age on the behavioral and physiological responses of piglets to tail docking and ear notching.
TLDR
Whereas tail docking and ear notching do appear to result in short-term pain and modulated immune status, processing on d 1 appears neither better nor worse thanprocessing on d 3, and there was no effect of treatment or age of treatment on suckling behavior.
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Measures of insensibility used to determine effective stunning and killing of poultry
TLDR
The absence of brain stem and spinal reflexes provides reliable evidence of insensibility after stunning and euthanasia procedures, and the complete cessation of neuromuscular spasms appears to be associated with brain death.
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