biostudies-literatureBrereton NDepartment of Agriculture. Food and the Marine13https://www.ebi.ac.uk/biostudies/studies/S-EPMC11225149biostudies-literatureUnknown77(1)<h4>Background</h4>Development of the cow-calf bond post-partum and passive immunity of calves from spring-calving beef × beef (B×B) and beef × dairy (B×D) cow genotypes was determined using primiparous and multiparous (Experiment 1), and primiparous and second-parity (Experiment 2) animals. In Experiment 1, calves either suckled colostrum naturally ('natural-suckling') (n = 126), or were fed colostrum, using an oesophageal-tube ('artificially-fed') (n = 26), from their dam within 1-h post-partum. In Experiment 2, all calves (n = 60) were artificially-fed colostrum from their dam. Prior to colostrum suckling/feeding, colostrum was sampled for IgG analysis. The cow-calf bond was assessed using CCTV recordings during the first 4-h post-partum. Calves were blood sampled at 48-h post-partum toIrish veterinary journalEffect of suckler cow breed type and parity on the development of the cow-calf bond post-partum and calf passive immunity.PMC11225149BeSAFE RSF 17S269Beltman MByrne CJMcGee MEarley BBrereton NMeredith DfalseEffect of suckler cow breed type and parity on the development of the cow-calf bond post-partum and calf passive immunity.<h4>Background</h4>Development of the cow-calf bond post-partum and passive immunity of calves from spring-calving beef × beef (B×B) and beef × dairy (B×D) cow genotypes was determined using primiparous and multiparous (Experiment 1), and primiparous and second-parity (Experiment 2) animals. In Experiment 1, calves either suckled colostrum naturally ('natural-suckling') (n = 126), or were fed colostrum, using an oesophageal-tube ('artificially-fed') (n = 26), from their dam within 1-h post-partum. In Experiment 2, all calves (n = 60) were artificially-fed colostrum from their dam. Prior to colostrum suckling/feeding, colostrum was sampled for IgG analysis. The cow-calf bond was assessed using CCTV recordings during the first 4-h post-partum. Calves were blood sampled at 48-h post-partum to2024-01-01T00:00:00Z2024 Jul2025-04-22T15:27:25.115Z2025-04-06T01:24:21.688ZS-EPMC112251493897008710.1186/s13620-024-00276-x