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Tail tip necrosis in Ontario beef feedlot cattle
Summary
Tail tip necrosis is prevalent in Ontario beef feedlots, especially those with slatted floors. This condition, linked to lameness, shows histological signs of cutaneous ischemia and affects over a third of tails at slaughter.
Area of Science:
- Veterinary Pathology
- Animal Science
- Beef Production
Background:
- Tail tip necrosis is a significant concern in the beef feedlot industry.
- Understanding its prevalence and characteristics is crucial for animal welfare and economic impact.
Purpose of the Study:
- To determine the prevalence and significance of tail tip necrosis in southern Ontario beef feedlots.
- To characterize the gross and histopathological features of the condition.
- To investigate potential associations with housing and identify effective treatments.
Main Methods:
- A mail survey of 255 beef feedlots (71 slatted, 184 solid floors) from 1982-1986.
- Development of a scoring system for necrosis severity.
- Histopathological examination of affected tissues.
- Inspection of 441 tails at slaughter plants.
Main Results:
- 96% of slatted-floor feedlots reported tail tip necrosis vs. 5% of solid-floor feedlots.
- Lameness was associated with tail tip necrosis.
- Histology indicated cutaneous ischemia.
- 34.5% of inspected tails showed lesions, with 4.3% amputated before slaughter.
Conclusions:
- Slatted floors are a risk factor for tail tip necrosis in beef feedlots.
- The condition is linked to lameness and shows signs of ischemia.
- Effective management strategies and further research into causes are needed.
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