Mastitis is a highly prevalent disease, which negatively affects cow performance, profitability, welfare, and longevity. The objectives of this study were (1) to quantify the impact first instance mastitis, at different stages lactation, on production economic (2) further mastitis when only cows that remain in herd for least 100 d milk (DIM) those 305 DIM are included analysis. A retrospective longitudinal was conducted using data from existing animal health record files Dairy Herd...

Intensification in animal production has led to increased indoor confinement for animals, limiting opportunities meet some behavioral needs such as exploration and locomotion. This poses a crucial question how these restrictions can be alleviated by providing additional space designed with that specific purpose mind. Working cows housed tie-stalls, our study aimed to: (1) quantify an exercise area outside the normal housing environment affects locomotor behavior; (2) evaluate access...

Prior research has yielded conflicting findings regarding the efficacy of treatments for hyperketonemia (HYK), with re­sponse varying depending on metabolic status cow. Early lactation concentrations non-esterified fatty acids (NEFA) and liver health index (LHI) – an associated inflammatory response calculated based plasma biliru­bin, albumin, cholesterol are used to determine if cow successfully transitioned lactation. Our study aimed assess effect propylene glycol persistence HYK in cows...

Routine hoof trimming around dry-off is a common preventa­tive practice for lameness on commercial dairy farms. Incor­porating second routine mid-lactation has been shown to reduce lameness. However, the addition of represents an additional cost farmer and, as result, must benefit farm economically and cow from welfare standpoint. Conflicting evidence with regard frequency timing brings into question whether all cows at or if certain populations can be omitted trims allow prioritization...

The purpose of this retrospective cohort study was to evaluate the effects timing hyperketonemia (HYK) diagnosis during early lactation on milk yield and composition, reproductive performance, herd removal. Plasma β-hydroxybutyrate (BHB) measured twice a week first 2 wk in 362 multiparous Holstein cows for HYK. In each week, were diagnosed as HYK positive (HYK+) if plasma BHB concentrations ≥1.2 mmol/L at least one tests evaluated. Milk-related outcomes (first 10 monthly tests) included...

Lameness is a persistent and underreported health welfare problem in the dairy industry, resulting reduced cow performance profitability as well early culling. The study objectives were (1) to quantify impact of first instance lameness, at different stages lactation, on production economic performance, (2) further impacts lameness when only cows that remain herd for least 100 d milk (DIM) those 305 DIM are included analysis. A retrospective longitudinal was conducted using pre-existing data...

Lameness in dairy cattle is a clinical sign of impaired locomotion, mainly caused by painful foot lesions, compromising the US industry's economic, environmental, and social sustainability goals. Combining technology on farm data may be more precise less labor-intensive lameness detection tool, particularly for early detection. The objective this observational study was to describe association between average weekly autonomous camera-based (AUTO) locomotion scores hoof trimming (HT) data....

Changes in prepartum behaviors such as total daily rumination (TDR), activity (TDA) and dry matter intake (DMI) have the potential to be used early indicators for cows at risk subclinical hypocalcemia (SCH) or hypomagnesemia (HYM) after calving. Our objective was investigate associations between average rate of change (ΔTDR), (ΔTDA) (ΔDMI) from -3 days calving with SCH HYM D0 D3 relative Prepartum TDR, TDA DMI were measured 64 Holstein dairy cows. Blood samples taken post-calving measurement...

The automation of farm tasks in dairy production has been on the rise, with an increasing focus technologies that measure aspects animal welfare; however, such are not often validated for use tie-stall farms. objectives current study were to (1) determine ability IceTag 3D pedometer accurately step data cows tie-stalls, and (2) whether leg which is mounted impacts data. Twenty randomly selected Holstein equipped pedometers each rear recorded 6 h over three 2-h periods. Two observers trained...

Cows on two separate farms were submitted to a 6 d preference test, repeated four times, consisting of three 2 phases (3 h d−1 phase−1): forced-indoor, forced-outdoor, and free-choice. A majority cows both chose be outdoors for at least 1 h. Previous experience may have contributed outdoor preference.

Monitoring the body condition score (BCS) of dairy cows is a management strategy that can assist producers in decision-making. The BCS and its variations reflect level fat reserves mobilization throughout different stages lactation. Cows mobilize excessive amounts response to increased energy requirements transition period are more likely have higher beta-hydroxybutyrate (BHB) concentration blood, leading incidence hyperketonemia postpartum. In this study, our main objective was evaluate how...

Tie-stalls, recognized as highly restrictive housing systems, could contribute to reduced locomotor skills in cows over time. While outdoor access is known benefit clinically lame cows, its influence on non-clinically lesser known. This study evaluated the of 1h daily gait and hoof health lactating Holstein tie-stalls. We examined 30 blocked by parity DIM, evenly assigned them one 2 groups: Exercise (1h 5d/wk for 5 weeks) or Non-Exercise. A visual scoring system assessed 6 attributes overall...

Our main aim was to investigate the predictive value of prepartum behaviors such as total daily rumination (TDR), activity (TDA) and dry matter intake (DMI) early indicators detect cows at risk for hyperketonemia (HYK), hypoglycemia (HYG) or high non-esterified fatty acid (NEFA) status in first (wk1) second week (wk2) postpartum. In a case control study, 64 Holstein were enrolled 3 weeks before expected time calving monitored until 15 days milk (DIM). Postpartum blood samples taken D3 D6 wk1...

Lameness, characterized by an anomalous gait in cows due to a dysfunction their locomotive system, is serious welfare issue for and farmers. Prompt lameness detection methods can prevent the development of acute cattle. In this study, we propose deep learning framework help identify based on motion curves different leg joints cow. The combines data augmentation convolutional neural network using LeNet architecture. Performance assessed cross validation showed promising prediction accuracies...

The objective of this retrospective cohort study was to investigate whether the association hyperketonemia (HYK) with reproductive performance differs based on milk production during first week lactation (wk 1). Data between calving and 150 d in (DIM) from 2,091 Holstein dairy cows 5 commercial herds Minnesota were collected. concentration β-hydroxybutyrate (BHB) measured twice 3 10 DIM whole blood diagnose HYK (defined as BHB ≥1.2 mmol/L). average wk 1 yield classified into levels (low =...

Shepley, E., Vasseur, Bergeron, R., Villeneuve, A. and Lachance, S. 2015. Short Communication: Birdsfoot trefoil as a preventative treatment for gastrointestinal nematodes in pastured dairy heifers. Can. J. Anim. Sci. 95: 533-537. Bioactive forages, such birdsfoot trefoil, may serve an alternative to anthelmintic drugs Differences parasite burden growth were examined between eight heifers fed mixture nine control heifer alfalfa silage 45-min per day 12 wk. A significant 3.8- 9.4-fold...