animal’s muzzle, feet, legs, udder and groin areas. When in doubt, use sticky tape to capture a specimen and take it to your veterinarian for identification.
Treatment and Control
There are two important things to keep in mind regarding treatment:
- All livestock on an affected premise should be treated at the same
- Most de-lousing treatments do not kill lice
Lice treatments come in many forms including sprays, pour-ons, dust bags, back rubbers, drenches, dipping vats and even injections for some lice species. Examples of treatments for different animal hosts appear in Table 2; your veterinarian may recommend extra-label use of other medications if a valid veterinary-client-patient relationship exists and proper record keeping is conducted. For all products, be sure to follow label instructions.
Theoretically, treating all livestock at the same time and re-treating two to three weeks later and moving to a clean environment should break the lice cycle. However, an infestation can persist if dusting powder is used and lice on an animal’s underbelly escape treatment or if nits on shed hair are transported to a new site via clothing, wind, equipment etc.
An early or mid-winter series of two treatments should be conducted when routine monitoring reveals three or more