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Disease surveillance in feedlot cattle is vital for minimizing morbidity and mortality and maintaining cattle welfare. Hanging a novel cotton rope for disease surveillance is commonly used in pig production but is less developed for feedlot cattle. The aims of this study were to 1) inform future rope-based disease surveillance methods by describing sick and healthy feedlot cattle behavioral interactions with a novel rope, and 2) evaluate how cattle rope interactions vary with time, environment, and individual animal characteristics. Cotton ropes were hung in feedlot pens for three 30-min sessions over six non-consecutive summer days at two feedlots. At Feedlot 1, a rope was hung in one chronic pen and seven healthy pens, and the observation sessions were: Early Morning (0545 to 0700 h), Afternoon (1245 to 1300 h), and Evening (1845 to 2000 h). Three pens were observed on each of the six days; the chronic pen, one healthy “novel” pen with cattle that had no rope experience that changed daily, and one healthy “repeat” pen that was sampled over all observation periods. At Feedlot 2, the methods were altered slightly to focus on “repeat” pens during times when staff would be at the feedlot. A rope was hung in one chronic pen and one “repeat” healthy pen each day. The observation sessions were: Early Morning (0615 to 0645 h), Late Morning (1015 to 1045 h), and Afternoon (1315 to 1345 h). Direct continuous observation was used to record the number of rope-directed interactions (RDIs) performed by individual cattle. Results are presented descriptively as means ± SD. On d 1 in healthy pens at both feedlots, the average number of RDIs was 164 ± 72, and the Early Morning session was slightly more active than the two later sessions. The Chronic Pens at both feedlots were much less active, with only 3 and 10 RDIs on D 1 in Chronic Pens 1 and 2, respectively. The average number of unique cattle that performed at least 1 RDI in a healthy pen on d 1 was 23 ± 7, with an average of 11 ± 4.6 cattle performing an RDI in each 30-minute session. The Chronic Pens were less active, with only 2 and 3 unique cattle performing an RDI on d 1 in the Chronic Pens 1 and 2, respectively. Overall, in the Chronic Pens, the number of individual cattle RDIs varied greatly, with a few sick cattle performing the majority of RDIs. Healthy cattle RDIs varied with age, time of day, and temperature, and chronic cattle RDIs varied with disease status and proximity to death. These results indicate that there is potential value in these methods for disease surveillance, but that clear consideration for how environmental and individual animal characteristics impact RDIs is imperative for successful disease surveillance. [ABSTRACT FROM AUTHOR]

Transition from the sow to nursery pens is a stressful time for pigs and commonly leads to postweaning anorexia and growth check. This can have negative impacts on pig health, welfare, and lifetime performance. The objective of this study was to test the relationship between enrichment use and feeder use immediately post-weaning on final nursery pig body weight (BW). At arrival, 29 mixed-sex pigs (Camborough 1050 X 337, PIC), 19 to 24d of age, were randomly sorted into 3 pens (~0.29 m2/pig) at the Iowa State University Swine Nutrition Farm. Each pen was equipped with a 4-hole, dry self-feeder measuring 0.6 m long. Each pen had two enrichment devices, consisting of one cotton rope and two biscuits, suspended from the feeder at pig height. Biscuits were replaced daily. Total number of interactions with the enrichment and feeder were collected at the individual pig level. All pigs were continually observed for two 1 h periods (h 1 and the h 6 after biscuit replacement) each day over wk 1 (d 0 – d 6). A pig was considered interacting with enrichment if its snout contacted the rope or enrichment biscuit. A pig was considered interacting with the feeder if 1) its head was over the feeder tray, and 2) its nose down in the feeder. Both enrichment and feeder interactions were considered terminated if the pig ceased active interaction for 3 s or more. Behaviors were summed together by time period and day for each pig. Individual BW were taken at the end of the 42-d nursery study. After the nursery trial was completed, the 29 pigs were allocated to a light BW treatment (n = 14) and a heavy BW treatment (n = 15) using the final average BW (24.22 kg) of the. Pigs with a final BW lighter than the group average were assigned to the light treatment, while pigs with a heavier BW than average were assigned to the heavy treatment. T-tests were conducted for enrichment and feeder interactions by final BW group and the pig was the experimental unit. A P ≤ 0.05 was considered significant. There were no observed differences between final pig body weight treatments and the enrichment and feeder interactions over the first week of nursery (P ≤ 0.87). Numerically, there were more overall enrichment interactions than feeder interactions for both BW treatments over wk 1 (Table 1). In conclusion, this enrichment device was of biological interest to the pigs, but other factors impact feeder usage in the first week and need to be considered in future work. [ABSTRACT FROM AUTHOR]

Co-mingling of beef feeder calves from multiple sources results in biological and behavioral stressors. This study is part of a project exploring social relationships between individual beef cattle and potential benefits of social buffering during stress events. Here, the specific objective was to explore whether feeder calves form preferential relationships which buffer them from surgical castration pain. Within the experiment, two treatment groups were established: Familiar calves were defined as calves who shared a source farm with two other calves in the pen, and Unfamiliar calves were defined as calves who did not share a source with any other pen-mates. It was hypothesized that Familiar calves would exhibit more lying, fewer pain-related behaviors, and fewer agonistic interactions following surgical castration than Unfamiliar pen-mates. Weaned beef bull calves [n = 102, body weight (BW) range ± SD = 112.95 to 370.10 ± 67.8 kg] from 23 source farms were randomly assigned to home pens, each comprised of three Familiar calves and three Unfamiliar calves. Cameras placed above the pens recorded video from which postural (standing and lying), social (agonistic and bunk displacements) and pain-related behaviors (wound checking and hind leg stamping) were quantified. Cattle were handled through a hydraulic squeeze chute once weekly over four consecutive weeks for data collection and standard processing procedures. On d 14 relative to arrival, calves were surgically castrated with multimodal pain mitigation. During all processing events, calves were marked with livestock paint for behavioral observations. Behavior was observed continuously for 15 min at five different time points (0 h, 1 h, 4 h, 24 h, 48 h) relative to when the last calf returned to the home pen after processing, and researchers were blind to treatment allocation. These time periods corresponded to expected periods when pain was absent and present based on duration of local anesthesia and systemic pain relief. Calf was the experimental unit. For the purpose of this abstract, data from the 48 h periods following d 7 and 14 were analyzed using the PROC GLIMMIX procedure of SAS; the model included treatment (Familiar, Unfamiliar) by week interaction. A P-value of ≤ 0.05 was considered significantly different. Regardless of treatment, preliminary analyses identified decreased lying (P < 0.02) and increased wound checking (P < 0.01) 48h following castration (d 14) when compared with the previous week (d 7). There were no observed differences for hindleg stamping (P = 0.2), agonistic behaviors (P > 0.06) or bunk displacement (P = 0.09). Based on preliminary analyses, we did not observe evidence of social buffering effects on castration stress during the immediate post-surgical period. [ABSTRACT FROM AUTHOR]

Cattle health management in the feedlot sector continues to evolve and improve cattle welfare by promoting an understanding of illness and injury to minimize their effects. Many papers have focused on treating individual ill or injured cattle in cattle feeding facilities. However, care, treatment, and outcomes for chronically ill or injured cattle (“chronic cattle”) have received little attention in the literature. The purpose of this descriptive study was to present demographics, diagnoses, and outcomes of chronic cattle in 17 feedlots in the U.S. and Canada and discuss potential risk factors and welfare implications. Individual chronic cattle information and treatment records from 17 feedlots (U.S.: 8; Canada: 9) over 7 yr (2014 – 2020) were retrospectively retrieved from a large feedlot consulting and data-management service (Feedlot Health Management Services, a division of TELUS Agriculture Solutions Inc.). Chronic cattle were defined as those that had spent time in a feedlot’s designated chronic pen. Descriptive results are presented as means ± standard deviations. U.S. feedlots averaged 31,280 ± 23,231 cattle/yr, had an average chronicity rate of 2.24 ± 2.42 % (median 1.53%), and contributed 52,709 chronic cattle to the dataset. Canadian feedlots averaged 21,913 ± 10,497 cattle/yr, had an average chronicity rate of 1.41 ± 0.82% (median 1.10%), and contributed 15,940 chronic cattle to the dataset. U.S. chronic cattle were sourced across all seasons primarily from auctions and ranches, had an average arrival weight of 163 ± 59 kg, and an average days on feed (DOF) of 362 ± 172 d. Canadian chronic cattle were primarily auction-sourced in the fall, weighed 272 ± 95 kg at arrival, and averaged 246 ± 141 DOF. Chronic cattle were treated at least once for respiratory issues (U.S.: 46.3%; Canada: 26.9%), bullers (U.S.: 34.5%; Canada: 5.8%), musculoskeletal issues (U.S.: 2.2%; Canada: 1.4%), lameness (U.S.: 1.7%; Canada: 28.1%), metabolic issues (U.S.: 0.5%; Canada: 4.5%), or other diagnoses (U.S.: 2.2%; Canada: 6.3%), with many cattle treated for multiple issues (U.S.: 12.5%; Canada: 27.0%). Outcomes for chronic cattle were shipped (U.S.: 73.1%; Canada: 52.5%), railed (U.S.: 8.1%; Canada: 20.7%), euthanized (U.S.: 0.7%; Canada: 9.9%) died unassisted (U.S.: 18.1%; Canada: 16.2%), or transferred (U.S.: < 0.1%; Canada: 0.8%). These results are some of the first to describe chronic cattle populations and present interesting trends for further analysis. For example, differences in buller and lameness rates could reflect actual differences but may be artifices of the dataset and feedlot definitions. Additionally, high marketed cattle rates (shipped and railed) indicate positive outcomes for most cattle, but variable mortality rates merit further scrutiny [ABSTRACT FROM AUTHOR]

Transition from the sow to nursery is a stressful time for pigs and commonly leads to negative impacts on pig health, welfare, and lifetime performance. The objective of this study was to determine if the addition of a biologically relevant enrichment device affected average daily gain (ADG) and average daily feed intake (ADFI) during the first 2 wk of nursery. A total of 160 mixed-sex pigs (Camborough 1050 X 337, PIC), 19 to 24 d of age [body weight (BW) = 5.77 SD 0.97 kg], were randomly allocated to pens at the Iowa State University Swine Nutrition Farm. Each pen contained 10 pigs (~0.29 m²/pig). Each pen was randomly assigned to one of two treatments: 1) enrichment device with no attractant (positive treatment; n = 8), or 2) no enrichment device (negative treatment; n = 8). Each positive treatment pen had two enrichment devices, consisting of one cotton rope and two biscuits, suspended from the feeder at pig height. The biscuits were replaced daily at about 0800 h throughout wk 1 in nursery (d 0 to d 6). In wk 2 (d 7 to d 13) no pens had an enrichment device. Each pen was equipped with a 4-hole, dry self-feeder measuring 0.61 m long and two affixed nipple drinkers. The feeder was weighed daily, and the pigs weighed weekly. Changes in daily feeder weight and weekly pig BW were used to calculate average daily feed intake (ADFI) and average daily gain (ADG). Pen was the experimental unit. Data were analyzed using the PROC Mixed procedure of SAS. The model included treatment, week, and treatment by week interaction. A P-value of ≤ 0.05 was considered significantly different. There was an observed difference in ADFI and ADG between wk (P ≤ 0.001, Table 1). However, there were no observed differences in ADFI or ADG for treatment (P ≤ 0.79) or treatment by week interaction (P ≤ 0.93). In conclusion, the addition of this biologically relevant enrichment did not improve or impair ADFI and ADG during the first 2 wk of the nursery phase. [ABSTRACT FROM AUTHOR]