Drenching

Summer

• Vaccinate all calves about 6-8 weeks – a multiple vaccination maybe given – e.g. “5 in 1”
• Give a second vaccination 4-6 weeks later
• Drench during the hot weather to reduce roundworm during the year.

Autumn

• Drench in April on properties where roundworm is a problem, especially 2 year old heifers and first time calvers.
• Drench in April for Liver Fluke in areas where it is a problem.
• Drench for Lice, which build up in cooler months.
• You can now get all in one pour-on drenches that do lice and worms.

Make sure there is enough feed for pregnant fat cows. Toxaemia may develop if feed is scarce!

Winter

• Drench for worms now to prevent a build up in spring.
• Watch for milk fever
• Watch for Grass Tetany- use of magnesium block licks, capsules, oil, hay treated with