Jock MacMillan

A review of the ovarian synchronization programs based on the use of gonadotrophin releasing hormone and prostaglandin F2α for dairy and beef heifers

A Sanz, K Macmillan, MG Colazo

Journal article  |  2019  |  ITEA Informacion Tecnica Economica Agraria

© 2019, Asociacion Interprofesional para el Desarrollo Agrario. All rights reserved. Artificial insemination has been utilized in ..

Responses to metabolic challenges in dairy cows with high or low milk yield during an extended lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2019  |  JOURNAL OF DAIRY SCIENCE

Responses of dairy cows with high or low milk yield (MY) beyond 450 d in milk (DIM) to 3 metabolic challenges were investigated. T..

Blood metabolite profile in Holstein-Friesian cows fed diets varying in dry matter and metabolizable energy density during early lactation

FY Obese, A Rabiee, S Humphrys, K Macmillan, A Egan

Journal article  |  2018  |  Comparative Clinical Pathology

Dietary effects on circulating concentrations of some blood metabolites were assessed in Holstein-Friesian cows in early lactation..

Plasma glucose and nonesterified fatty acids response to epinephrine challenges in dairy cows during a 670-d lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2018  |  JOURNAL OF DAIRY SCIENCE

This experiment investigated the metabolic response to a 2-dose epinephrine challenge of dairy cows undergoing an extended lactati..

A 100-Year Review: A century of change in temperate grazing dairy systems

JR Roche, DP Berry, AM Bryant, CR Burke, ST Butler, PG Dillon, DJ Donaghy, B Horan, KA Macdonald, KL Macmillan

Journal article  |  2017  |  JOURNAL OF DAIRY SCIENCE

From 1917 to 2017, dairy grazing systems have evolved from uncontrolled grazing of unimproved pastures by dual-purpose dairy-beef ..

Milk protein concentration, estimated breeding value for fertility, and reproductive performance in lactating dairy cows

John M Morton, Martin J Auldist, Meaghan L Douglas, Keith L Macmillan

Journal article  |  2017  |  JOURNAL OF DAIRY SCIENCE

Milk protein concentration in dairy cows has been positively associated with a range of measures of reproductive performance, and ..

Responses of plasma glucose and nonesterified fatty acids to intravenous insulin tolerance tests in dairy cows during a 670-day lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2017  |  JOURNAL OF DAIRY SCIENCE

The metabolic response of dairy cows undergoing an extended lactation to an insulin tolerance test (ITT) was investigated. Twelve ..

Associations between early lactation milk protein concentrations and the intervals to calving for Holstein cows of differing parity

Jack Fahey, John M Morton, Martin J Auldist, Keith L Macmillan

Journal article  |  2017  |  ANIMAL PRODUCTION SCIENCE

High milk protein concentrations (MP%) have been positively associated with the reproductive performance of lactating dairy cows. ..

Associations between milk protein concentration, milk yield, and reproductive performance in dairy cows

JM Morton, MJ Auldist, ML Douglas, KL Macmillan

Journal article  |  2016  |  JOURNAL OF DAIRY SCIENCE

Milk protein concentration in dairy cows has been positively associated with a range of measures of reproductive performance. It w..

Associations between milk protein concentration at various stages of lactation and reproductive performance in dairy cows

JM Morton, MJ Auldist, ML Douglas, KL Macmillan

Journal article  |  2016  |  JOURNAL OF DAIRY SCIENCE

Milk protein concentration has been positively associated with a range of measures of reproductive performance in dairy cows. Thes..