We use cookies to provide you with a better experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.
  • Sign In
  • Create Account
  • Sign Out
  • My Account
subscribe / renew
  • Livestock
    • Beef
    • Dairy
      • Canada
      • U.S.
    • Sheep & Goats
    • Other Livestock
  • Crops
    • Grains
      • Barley
      • Wheat
    • Hay
    • Pasture
    • Ensiled Forages
  • Equipment
  • Magazines
    • Progressive Dairy US
    • Progressive Dairy — Canada
    • Progressive Dairy – en francais
    • Progressive Forage
    • Progressive Cattle
    • Progressive Cattle - Canada
    • Idaho Ag Proud
  • Blogs
  • Buyers Guide
  • Advertise
  • Ask AgProud

Progressive Dairy

Progressive Dairy Canada

PD Canada en Francais

Progressive Cattle

Progressive Cattle Canada

Progressive Forage

Agproud Idaho

Home

Home » Authors » Harold Newcomb
Harold Newcomb

Harold Newcomb

Technical Services Specialist / Merck Animal Health
Email Harold Newcomb
Articles

ARTICLES

63508-newcomb-TX-feedlot---NWS---Prog-Cattle---July.jpg

Stay informed about New World screwworm

New World screwworm (NWS) is a serious concern for the cattle industry. By staying informed and working with your veterinarian, you can help support livestock health and protect the industry.
June 3, 2026
Harold Newcomb

Are you prepared for New World screwworm (NWS)? Originally eradicated from the U.S. in 1966, NWS (Cochliomyia hominivorax) larvae (myiasis) presents a challenge many cattle producers have never experienced firsthand.


Read More
1320pd

Deworming dairy replacement heifers is a balancing act

June 10, 2020
Harold Newcomb
Even a few parasites in a high-producing dairy cow have the potential to reduce herd performance. Parasite-free animals convert feed more efficiently, have fewer disease problems, enter the milking string sooner, produce more milk and have fewer reproductive difficulties.
Read More
Vetting cattle

Is your dewormer working? The answer may surprise you

October 24, 2019
Harold Newcomb
Deworming is a widely accepted practice that can improve performance and provide considerable economic advantage.
Read More

The effects of drought on internal parasitism of cattle

February 24, 2013
Harold Newcomb
The effects of the drought of 2012 have generated both financial and animal health challenges for the cattle industry. As drought continues in many areas across the country this winter and spring, cattle producers need to manage the health of their animals at a higher level, including the impact of internal parasites.
Read More

Cooperia study shows ineffective dewormers’ costly effects

April 24, 2012
Harold Newcomb
The parasite Cooperia has become the most prevalent internal parasite in U.S. cattle operations, according to research data from USDA’s National Animal Health Monitoring Service (NAHMS) Beef 2007 to 2008 cow-calf survey.
Read More

Are you deworming your pasture?

October 11, 2011
Harold Newcomb
Internal parasites can affect every segment of dairy production when animals have been grazing even for short periods of time. Parasite infections have a costly effect on cattle health and performance including reproductive losses, hampered immune responses, reduced appetite and lower weight gain.
Read More

Are you deworming your pasture?

May 1, 2011
Harold Newcomb
Internal parasites affect every segment of cattle production
Read More
  • RECENT ARTICLES
  • 63520-clements-forage-test.jpg

    How daily decisions shape long-term herd performance

    June 6, 2026
  • PD webinar

    [Webinar] Dairy Market Update June 2026: Protect What You've Built Before July 1

    June 5, 2026
    • Another summer of water worries

      June 5, 2026

FREE NEWSLETTERS

Award-winning coverage of in-depth news and analysis to make your business more profitable.

SIGNUP TODAY
Advertisement
THE GUIDE

How do I get my company listed in your Buyers Guide? 
Submit a request to be listed for FREE in the Buyers Guide here.

Why can I only see so many articles before I have to register for the site?
Find out why here.

SUBSCRIBE to Leading Industry Magazines

Award-winning coverage of in-depth news and analysis to make your business more profitable.

Subscribe/Renew
Advertisement

I'm looking for ________

Find the right products and services for your farm, ranch or operation.

CHECK OUT OUR BUYERS GUIDE
Advertisement
  • FEATURED PODCASTS
  • [Podcast] Performance By Design: Science-driven solutions for today’s calf raisers

    Progressive Dairy
    Podcasts
    SPONSORED BY IFF Animal Nutrition & Health
  • [Podcast] What it takes to raise great heifers and build a winning team culture with Jason Shamburg and Nic Schoenberger

    Progressive Dairy
    Podcasts
PERSONALIZED CONTENT
Create an account and see website content tailored to your operation.  It only takes a few seconds!
SEE RECOMMENDATIONS NOW!
Copyright © 2026 Progressive Publishing

MORE INFORMATION
  • About Us
  • Terms & Conditions
  • Privacy Policy
  • FAQs
  • Advertise
  • Shop
  • Stats Posters

OUR MAGAZINES
  • Progressive Dairy
    • Facebook
    • Twitter
    • Linkedin
  • Progressive Dairy — Canada
    • Facebook
    • Twitter
    • Linkedin
  • Progressive Dairy — en français
    • Facebook
  • Progressive Cattle
    • Facebook
    • Twitter
    • Linkedin
  • Progressive Cattle — Canada
    • Facebook
    • Linkedin
  • Progressive Forage
    • Facebook
    • Twitter
  • AgProud — Idaho
    • Facebook
    • Linkedin

CONTACT INFORMATION

Progressive Publishing
238 West Nez Perce (physical)
PO Box 585 (mailing)
Jerome, ID 83338

   

info@progressivepublish.com
(800) 320-1424
(208) 324-7513 (Main)
(208) 324-1133 (Fax)