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Reasons for culling in Iranian Holstein cows
Culling of dairy cows is probably one of the most complex decisions
in dairy operations. It involves several factors and farmers consider
e.g. stage of lactation, age, health status, level of milk production
and current...
Dynamics of culling for Jersey, Holstein, and Jersey × Holstein crossbred cows in large multibreed dairy herds
REASONS FOR CULLING IN HOLSTEIN DAIRY HERDS IN MASHHAD SUBURB, KHORASAN RAZAVI PROVINCE, IRAN
The aim of the study was to determine the causes of lactating cow culling that influence the length of cow utilization in dairy herds.
Data regarding number of culling, parity at culling and reason(s) for culling were collected in a one...
Evaluation of mastitis as a cause of lameness and digital lesions in dairy cows
Lameness and mastitis beside infertility are major health concern and economic loss in dairy herds that affect animal health and reduce productivity and comfort of the cows.
Regards to occurrence of lameness after ...
Factors associated with age at slaughter and carcass weight, price, and value of dairy cull cows
Bovine leukemia virus and cow longevity in Michigan dairy herds
The effect of repeated episodes of bacteria specific clinical mastitis on mortality and culling in Holstein dairy cows
Evaluation of the culling rate in cows with interdigital necrobacillosis
Culling in cows is a complicated condition. Many factors such as, age (parity), milk production, fertility, health, season, feed price, and other variables may influence severity of this condition. Infectious foot diseases are common in dairy herds...
Reasons for culling of Holstein dairy cows in Neyshabur area in northeastern Iran
This study was designed to determine the culling rates of 23 Holstein dairy herds (with an average size of 180 cows per herd) in Neyshabur area in northeastern Iran over a period of three years from 2001 to 2003. The average annual culling rate...
Characterisation and pattern of culling in Holstein-Friesian dairy herds in Khorasan Razavi Province, Northeast of Iran
To describe proportion and pattern of culling in commercial dairy herds of Khorasan Razavi province, this survey was carried out from 21st March 2008 to 20th March 2009 in 15 industrialized dairy herds. For each culled cow data related to parity...