There’s Potential for Poisoning During Fall Grazing

– Jordan Penrose, Ohio State University Extension Agriculture and Natural Resources Educator, Gallia County (previously published in Farm & Dairy)

With fall fast approaching, it may be time to assess potential problems that could arise when livestock are grazing, such as trees and grasses. A good practice of walking or driving through your pastures will help you know what is growing in or around them.

Continue reading

The Core Vaccines every Ohio beef cow should be receiving

Many health challenges on the farm can be avoided with a proper herd health management program. During the third session of the 2022 Virtual Beef School held on Monday, March 21st Dr. Justin Kieffer, Clinical Veterinarian for the Department of Animal Sciences at OSU, offered a beef herd health management update.

More specifically, Dr. Kieffer spent a few minutes that evening sharing the core vaccines he believes every Ohio beef cow should receive. Embedded below Dr. Kieffer shares that list of five vaccines.

To view Dr. Kieffer’s herd health presentation from the 21st in its entirety, visit this YouTube link: https://youtu.be/rrxabT5ksiI

2022 Beef-Dairy Crossbreeding Program

Many dairy herds are implementing a beef-dairy crossbreeding program for all or a portion of their lactating cows in order to add value to newborn calves. This webinar will provide a practical approach to assess a beef-dairy crossbreeding program with emphasis on the maternity and survival and performance of postpartum calves and cows. The webinar is free of charge, but you must register (available in English and Spanish).

Continue reading

Pasture Bloat Concerns and Responses

Last week in this publication we shared concerns for frothy bloat in pastured cattle. As a follow up, in this episode of Forage Focus, Host- Christine Gelley- Extension Educator, Agriculture & Natural Resources in Noble County and Dr. Steve Boyles, OSU Extension Beef Specialist, dig deeper into the causes and possible solutions for frothy bloat occurrences in pastured livestock. Their discussion includes how pasture managers need to be observant of forage growth, weather conditions, and animal behavior to avoid conditions that commonly trigger bloat and to recognize and treat bloat quickly if it occurs.

Ruminal Acidosis (Grain Overload)

Dr. Richard Bowen, Professor, Department of Biomedical Sciences, Colorado State University (Previously published online with Colorado State University, VIVO Pathophysiology)

The rumen encases a complex ecosystem containing numerous species of bacteria and protozoa that collectively provide the capacity for efficient fermentation of carbohydrates. Among the major products of such fermentation are volatile fatty acids and lactic acid. Wild ruminants and those raised on pasture consume a diet rich in grasses of one sort or another that consist mostly of cellulose. Cellulose is a molecule that might be called a “slowly fermentable carbohydrate”. In contrast, grains such as wheat, barley, and corn are considered “highly fermentable carbohydrates”, meaning that they can be very rapidly fermented to generate – you guessed it – large quantities of volatile fatty acids and lactic acid. Ruminal acidosis results from consumption of a unaccustomed quantity of highly fermentable carbohydrate, almost always well described as grain overload.

Ruminal acidosis is most commonly a disease of dairy and feedlot cattle, and occasionally sheep in feedlots. All of these animals are typically fed large quantities of grain, because such a diet promotes production of milk and enhances growth. The key point is that animals and their ruminal microbes must be adapted over time to a high grain diet, rather than being acutely changed to such feed, otherwise acidosis commonly ensues. In some cases, animals develop acute acidosis “accidentally”, when, for example, they escape from their pen and get into a store of grain.

 

 

Continue reading

Grass Tetany/ Hypomagnesemia –Start Preventive Measures Now

– Dr. Michelle Arnold, Ruminant Extension Veterinarian, University of Kentucky Veterinary Diagnostic Lab; A special thanks to Dr. Jeff Lehmkuhler for his contributions to this article.

What is “Grass Tetany” and when are cattle most likely to have it? Grass tetany, also known as spring tetany, grass staggers, wheat pasture poisoning, winter tetany or lactation tetany, is a condition resulting from a low level of magnesium (Mg) in the blood. Maintenance of blood magnesium depends on the amount obtained from the daily diet since the magnesium present in teeth and bones and is not easily mobilized in times of need. Magnesium is required for proper nerve and muscle function so low levels in the blood result in “tetanic spasms” where muscles contract uncontrollably. The disorder in an adult cow begins with separation from the herd and going off feed. The ears are often erect and twitching and the cow is alert, hyperexcitable and may be aggressive. The symptoms quickly progress to muscle spasms, convulsions, difficulty breathing, and death. Often the affected animal is found dead with evidence of thrashing and struggle on the ground around her. Deficiencies occur most often in beef cows when they are nursing a calf and grazing young, green grass in early spring. Fast-growing spring pastures are high in potassium (K+) and nitrogen (N+) and low in magnesium (Mg++) and sodium (Na+) ions. Affected cattle often have low blood calcium concurrently. Fall calving cows may also experience grass tetany during the winter months.

Continue reading