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J Anim Sci

Title:		Administering an appeasing substance to beef calves at weaning to optimize productive and health responses during a 42-d preconditioning program
Author(s):		Schubach KM; Cooke RF; Daigle CL; Brandao AP; Rett B; Ferreira VSM; Scatolin GN; Colombo EA; D'Souza GM; Pohler KG; Cappellozza BI;
Address:		"Department of Animal Science, Texas A&M University, College Station, TX. Prairie Research Unit, Mississippi State University, Prairie, MS. Faculdade de Medicina Veterinaria e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brazil. Nutricorp, Araras, SP, Brazil"
Journal Title:		J Anim Sci
Year:		2020
Volume:		98
Issue:		9
Page Number:		-
DOI:		10.1093/jas/skaa269
ISSN/ISBN:		1525-3163 (Electronic) 0021-8812 (Print) 0021-8812 (Linking)
Abstract:		"This experiment evaluated the impacts of administering a bovine appeasing substance (BAS) to beef calves at weaning on their performance, physiological responses, and behavior during a 42-d preconditioning program. Eighty calves (40 heifers and 40 steers; 90% British x 10% Nellore) were weaned at 233 +/- 2 d of age (day 0); ranked by sex, weaning age, and body weight (BW); and assigned to receive BAS (IRSEA Group, Quartier Salignan, France; n = 40) or placebo (diethylene glycol monoethyl ether; CON; n = 40). Treatments (5 mL) were topically applied to the nuchal skin area of each animal following dam separation. Within treatment, calves were allocated to one of eight drylot pens (four pens per treatment; pen being the experimental unit) and received a free-choice total mixed ration (TMR) from day 0 to 42, intake of which was assessed daily. Live behavior observations were conducted on days 1, 2, 4, 8, 16, and 32. Temperament was assessed and blood samples were collected via jugular venipuncture on days -21, 0, 3, 7, 14, 28, and 42. Hair samples were collected from the tail switch on days 0, 14, 28, and 42. Calves were vaccinated against bovine respiratory disease viruses on days -21 and 0. Average daily gain from day 0 to 42 did not differ between treatments (P = 0.57) but was greater (P = 0.05) in BAS vs. CON calves from day 0 to 28. Intake of TMR was greater (P = 0.05) during the first week for BAS vs. CON calves (treatment x week; P = 0.08). The mean proportion of calves feeding simultaneously and performance of social and play behaviors were greater (P
Keywords:		"Animal Feed/analysis Animals Antibodies, Viral/*blood Body Weight/drug effects Cattle Cattle Diseases/*prevention & control Diarrhea Viruses, Bovine Viral/*immunology Diet/veterinary Female Haptoglobins/analysis Immunity, Humoral/*drug effects Male Pherom;"
Notes:		"MedlineSchubach, Kelsey M Cooke, Reinaldo F Daigle, Courtney L Brandao, Alice P Rett, Bruna Ferreira, Vitor S M Scatolin, Giovanna N Colombo, Eduardo A D'Souza, Genevieve M Pohler, Ky G Cappellozza, Bruno I eng 2020/08/23 J Anim Sci. 2020 Sep 1; 98(9):skaa269. doi: 10.1093/jas/skaa269"