304 North Cardinal St.
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304 North Cardinal St.
Dorchester Center, MA 02124
How Often Should You Drench Sheep? As a general guideline, non-breeding sheep should need a single drench a year, and lambing ewes and weaners two drenches. Please keep in mind that conditions on your property and in your region will ultimately affect how many drenches you need.
Can you over drench sheep? Overdosing sheep or lambs with drench or incorrect pre or post drenching management can be fatal so it is important to consider how you drench as well as ‘when’ and ‘what with’. Key drenching principles include: Always read the product label for both dosage and safety information.
What time of year do you drench sheep? If your sheep are “dry” – i.e. you won’t be using them for breeding – in most hobby farm situations, a drench at shearing time is usually sufficient. If your sheep are for breeding, a drench around 4 weeks before lambing should see the ewe through the stress periods of late pregnancy and lamb raising.
How often do you treat sheep for worms? Ewes should only be wormed once a year at lambing time; this will reduce the number of eggs on the pasture so that there are less for lambs to pick up. Lambs have little resistance to worms in their first grazing season but this develops with time.
Lambs may require drenching at 12- 14 weeks even if not weaned at this time as recommended. In some cases where early weaning is not practised, ewes also may need an extra drench, because of greater exposure to contaminated pasture.
Ivomec (ivermectin) sheep drench is the preferred and primary product used to deworm sheep by most shepherds. It treats adult and fourth-stage larvae of gastrointestinal roundworms, lungworms, and all larval stages of nasal bots.
Parasitic infestation can result in decreased production of ewes and lambs on pasture through reduced milk production and poor weight gains, and even death may occur in extreme cases.
Tapeworm infestations. While segments of tapeworms are often seen in the faeces of growing lambs in the UK they exert no adverse effects on growth rate and treatment is not usually considered necessary. The use of group 1-BZ wormers in lambs will remove tapeworm infection.
You can be creative with administering Garlic Juice to Sheep: Garlic and garlic juice is know in many countries to be an excellent dewormer. It is administered to sheep in many creative ways: Added to kelp, added to dry feed, mixed with molasses and salt, mixed with bread-molasses-milk and salt, etc.
Levamisole is a short acting clear drench. Levamisole is still highly effective against barber’s pole worm and Nematodirus on most properties. Nematodirus is often a problem after drought or in lambing paddocks as the egg is resilient and can survive in hot, dry conditions for long periods.
The worms are visible during necropsy. The symptom most commonly associated with barber pole worm infection is anemia, characterized by pale mucous membranes, especially in the lower eye lid; and “bottle jaw,” an accumulation (or swelling) of fluid under the jaw.
There are four components of an effective worm control program. They are drenching, grazing management, nutrition and breeding worm resistant sheep. Drenching alone will not resolve a worm problem. Too frequent drenching may reduce the sheep’s immunity to worms and increase the problem of drench resistant worms.
The most common internal parasites in sheep and goats are: lung worms (Dictyocaulus spp. or Muellerius capillaris); stomach worms (Haemonchus contortus, commonly called barber pole worm); liver flukes (Fasciola hepatica); and intestinal parasites, the most common of which are coccidia (Eimeria or Isospora).
DO NOT WITH-HOLD FOOD FROM HEAVILY PREGNANT EWES. Only use wormers when needed – Faecal Worm Egg Count tests can be run to see if your sheep need wormed.
Now all breeding sheep are dipped annually in an automatic mobile dipping truck, and last year, all lambs were dipped too – 6,500-head in total. Mr North-Lewis says he has seen five clear benefits of plunge dipping this way.
The recommended dose level is 1 mL of IVOMEC Injection per 50 kg of body weight (200 µg of ivermectin per kg). The recommended route of administration is by subcutaneous injection. The solution may be given with any standard automatic or single-dose equipment.
Merial has launched Eprinex Multi 5mg/ml Pour-on for Beef and Dairy Cattle, Sheep and Goats, the first licensed, zero milk withdrawal, pour-on worm control product to be made available to sheep and goat dairy producers.
Ivermectin Sheep Drench is indicated for the effective treatment of gastrointestinal roundworms (including Haemonchus contortus), lungworms and nasal bots in sheep. When used as recommended, it provides effective control of the parasites shown in the table.
Cydectin 0.1% w/v Oral Solution for Sheep
CYDECTIN 0.1% Oral Drench for Sheep has a wide margin of safety and symptoms of overdose do not generally occur at less than 5 times the recommended dose. They are manifested as transient salivation, depression, drowsiness and ataxia 8 to 12 hours post-treatment.
Sheep farmers can reduce worm burdens in lambs and improve their growth rates by treating ewes with a long-acting wormer prior to lambing, a recent study has found. Around two weeks before lambing until six weeks post lambing ewes are more likely to shed worm larvae due to decreased immunity.
Administer 2 mL per 100 lb body weight for cattle and 1 mL per 50 lb body weight for sheep. Unused portion of prepared solution can be stored for up to 3 months. 48 hours slaughter withdrawal for cattle.
500–1000 This range of counts is entering the ‘high’ range. Production losses could become significant – particularly in young lambs with no immunity (around 3–4 months of age).
Tapeworm segments can be seen in the feces of sheep and goats. They have a white, grain-like appearance. Adult worms, often up to a meter or more in length, can be expelled and passed in the environment. Tapeworm eggs can be seen in sheep and goat feces, using the standard worm count procedure.
Safe-Guard/ Panacur Suspension (10% or 100 mg/ml): Note that SafeGard is not approved for use in sheep. Sheep dose is 5 mg/kg orally; meat withdrawal time of 6 days. Ivomec Drench for Sheep (0.08% or 0.8 mg/ml): 0.2 mg/kg orally; approved in sheep with meat withdrawal time of 11 days.
If you purchase or agist sheep or borrow a ram to mate with your ewes, they may bring worm problems from their previous property. New arrivals should be given a “quarantine drench” and kept from pasture for 6 to 8 hours until it has had a chance to act.