Prep for housing: worming/fluking
Prep for housing: worming/fluking
Parasites to consider at housing:
- Gut worms
1st and 2nd season grazed youngstock
This age group are most susceptible to gut and lung worms as cattle have not had time to develop a protective immune response until after their 2nd grazing season. Treat all youngstock at housing with a product that will remove all inhibited larvae (Group 3-ML – clear injection/pour-on, e.g. Enovex). Group 1-BZ (albendazole, fenbendazole, oxfendazole) products are not guaranteed to remove all inhibited larval stages and Group 2 yellow drenches (Levamisole) have no effect on the inhibited larval stages.
Purchased 1st lactation dairy/ 1st lactation beef cattle
The immune status of these animals is unknown with respect to lungworm. It is worth paying particular attention to this group of animals and treating them if they are coughing or under conditioned. Dairy cattle can be treated with an eprinomectin product (e.g. Eprizero – zero milk withdrawal). Beef cattle can be treated with any class of wormer as there are currently no know resistance issues.
Adult dairy/beef cattle
Adult cattle should not require any treatment for gut worms as they will have built up protective immunity. However it may be beneficial to perform faecal egg counts in any animals in poor condition so that they can be treated if necessary.
All age groups
Cattle (and sheep) are susceptible to fluke infection at all ages. They are unable to develop a protective immune response. A bulk milk test can be a useful tool in monitoring the infection level in milking herds. Faecal tests can also be used to determine infection status in individual or groups of animals.
Treatment should target adult fluke. Products containing Oxyclosanide (e.g. Distocur) or albendazole (Tramazole, Albex, Endospec) may be used in milking herds (usually at dry-off) as they have a short milk withhold (Oxyclosanide = 108hrs and albendazole = 60hrs). Whenever possible we should avoid the use of triclabendazole products in cattle as this drug targets immature fluke which are more significant in sheep. Resistance to triclabendazole products is becoming more widespread.
Wait until Christmas (or until cattle have been housed for 10 weeks) to treat all cattle. This will ensure that all fluke are removed (all fluke will be adults and susceptible to Oxyclosanide/albendazole).
The problem with combination products is that they all contain 2 drugs which logically should not be given together. They are also more costly as you are paying for the “convenience” of a “2-in-1” product.
For example, if you used a product containing ivermectin and closantel at housing, you will remove all worms, but very few fluke as closantel will only kill fluke that were ingested over 7 weeks ago. Therefore another fluke treatment would be needed later on. If you waited until the cattle had been housed for at least 7 weeks before dosing they will have carried their worm burden for an extra 7 weeks+. Adult cattle do not need treating with combination products as their worm burden will be low and does not require treatment. So overall, combination products are a more costly option and may increase the risk of resistance to these drugs.
Please get in touch for competitive prices on Enovex pour-on, Eprizero pour-on and Distocur.