Role of Environment of Bovine Lameness Flashcards
what structure is this
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cornary band
what structure is this
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cornium
what is the normal weight bearing
50/50 even distribution between both claws
what is the overgrowth cycle
- normal foot exhibiting normal weight bearing distribution and normal locomotion
- loss of normal weight distribution
- increased pressure on feet
- increase growth rate
- loss of normal weight distribution –> grossly malformed foot predisposed to several causes of lameness
where does the overgrowth occur
abaxially and anteriorly
weight bearing surface shifts posteriorly
what are the main causes for bovine lameness
- solar lesions
- white line lesions
- skin lesions
what are the types of solar lesions
- solar ulcer
- solar bruising
- thin soles
what is the cause of solar lesions
repetitive excess trauma –> walking too far, staying on feet too long
what are white line abscesses caused by
stones, uneven surfaces
what are axial wall lesion
on axial surface of white line
what are the causes of white line lesions
weakening of the lamellar junction –> twisting and turning, softening by constant moisture, sharp stones, laminitis
what is digital dermatitis
skin lesions
what is inter-digital necrobacillosis
caused by fusobacterium necrophorum
what are sole lesions
- double sole
- toe ulcer
- foreign body
what lesions happen to the heel
- slurry heel
- heel ulcer
what are skin lesions
- inter-digital hyperplasia
- mud fever
what are wall lesions
- horizontal fissure
- verticle fissure
- corkscrew claw
what causes lameness
- repetitive trauma
- overgrowth cycle
- twisting and turning –> (wet + small stones)
- laminitis
- moist, mild dirty slurry
how does the environment cause lamess
- walking –> roadways, housing, stockmanship
- standing –> housing
- lying –> housing
how do roadways affect lameness
dry
smooth, even surface
wide enough to prevent congestion (allow dominance)
distance = increased energy requirement
what increases standing times
time locked out of bedding area (pre-milking, milking, post-milking)
cleaning beds
feeding
poor access to beds/not enough beds
poor cubicle design
not comfortable cubicles
what are these structures
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what are these structures of the ruminant hoof
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what are these structures of the ruminant hoof
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