Goals T o Survey 300 dairy herds regarding biosecurity on their - PDF document

06.06.2014 Ontario Dairy Hoof Health Project Goals  T o Survey 300 dairy herds regarding biosecurity on their farm  T o record hoof health on 315 Ontario dairy farms and up to 30,000 head of dairy cattle  T o do a full risk assessment on 60 dairy farms Herd Requirements Cattle must be registered with a breed association under the Animal Pedigree Act and on milk recording with CANWEST DHI 1

06.06.2014 335 Project Herd Locations By using New Communication Technology for hoof trimmers 2

06.06.2014 Incorporating the Foot Atlas Established in 2008 by the International Lameness Committee, Zinpro Corp. Which allows a standard evaluation of location and severity of lesions 3

06.06.2014 Project Trimmers received Training for Program Use and Lesion identification according to a standard Guide Housing for Lactating Cows is: 19% Tie stall Free stall 81% 4

06.06.2014 Does This Herd Have Cows With BDD Today? 120 71% 100 100 Number of Responses 80 60 91% 36 40 31 20 5 2 1 1 0 0 Yes No No Answer Yes No No Answer Yes No Free stall Tie stall Pack Herd & BDD Status Ontario Preliminary Results June 6/12 Ontario 283 Participating Farms 19,169 T otal Distinct Cows Digital Dermatitis 7,225 Sole Ulcer with Lesions White Line Lesion Lesions: Sole Hemorrhage 3,570 35.7% Digital Dermatitis Toe Ulcer 1,327 13.3% Interdigital Hyperplasia Sole Ulcer 832 8.3% Thin Sole White Line Lesion Foot Rot 2,127 21.3% Sole Hemorrhage Heel Erosion 162 1.6% T oe Ulcer 764 7.6% Corkscrew Claw Interdigital Hyperplasia 108 1.1% Interdigital Dermatitis Thin Sole 110 1.1% Foot Rot Axial Fissure 232 2.3% Heel Erosion Vertical Fissure 130 1.3% Corkscrew Claw 574 5.7% Horizontal Fissure Interdigital Dermatitis 34 0.3% Axial Fissure Vertical Fissure 23 0.2% Horizontal Fissure 10 0.1% T otal Lesions 10,003 100.0% 5

06.06.2014 Provincial Comparisons Alberta British Ontario Columbi a # Participating 147 70 283 farms T otal Distinct 27,666 8,137 19,169 cows with lesions 13,481 48.6% 4,679 57.5% 7,225 37.7% Lesions Digital 8,371 44.8 2,581 40.3% 3,570 35.7% Dermatitis Sole Ulcer 3,065 16.4% 821 12.8% 1,327 13.3% White Line 2,598 13.9% 846 13.2% 832 8.3% Sole 1,235 6.6% 490 7.6% 2,127 21.3% Hemorrhage T oe Ulcer 901 4.8% 335 5.2% 162 1.6% Our Project allowed for new thought processes  Creating a series of logic lines for farmers, trimmers and veterinarians to explain outbreaks of digital dermatitis 6

06.06.2014 Prioritizing on-farm Risk Factors for Bovine Digital Dermatitis (BDD) Foot Conformation New cattle Stocking Environmental Nutrition Cattle (Interdigital Cleft entry to the Density System Protein Level Hygiene Level of Risk Space) barn Increased Addition of Increased Increased narrowing Increasing dietary cattle from Risk Increased protein Increased confinement & body of the cow density Increased body protein and many sources Increasing cow Increased confinement & in diet increases addition of cattle Interdigital space Interdigital space narrowing housing type soiling soiling Theory density increases housing type increases nitrogen in urine from more increased increasing the risk of BDD increases the Risk theory the risk of BDD the risk of BDD and the risk of sources increases ammonia risk of BDD BDD the risk of BDD Clean body, Closed Herd – Low Rank 3 (open = 3.7 mm) 90% Yearly pasture 16% legs, feet and No live cattle Clean body Closed herd 90% Rank 3 – open udder introductions Yearly pasture 16% Low legs, feet no live cattle stocking is >3.7mm and udder introductions rate Moderate Selected cattle Med Rank 2 (partial openness) 100% Tiestall, 18% soiling of legs from limited and feet. number of farms Selected Tie stall 100% Moderate Severe Rank 2 cattle from a Medium seasonal 18% stocking soiling of soiling of Purchase of many partial openess Freestall, total limited High Rank 1 (cleft is closed) 130% pasture 20% legs, udder, cattle from many rate legs and confinement number of feet and sources. feet body. farms Purchase of Severe Free & tie stall, many cattle 130% High soiling of Rank 1 – cleft is 20% total from many stocking legs, feet closed confinement sources rate and udder Thank you for your attention 7