This is essentially no program at all, but may work in all well nourished adult herds and in areas of low population density. Salvage deworming is a plan where animals are only dewormed when they show signs of disease such as anemia, diarrhea, and weakness. Parasite control does not make use of dewormers but does apply some appropriate management procedures. A dairy where calves and replacement heifers are raised elsewhere might make use of this program. Periodic examination of manure to ensure low parasite burdens would be of help.
Parasite control makes use of both management procedures and dewormers.
Dewormers are given to all animals both spring and fall. This is a time honored plan which is based on tradition and convenience and makes use of the fact that animals are often handled in the spring and fall anyway. Parasite control makes use of both dewormers and appropriate management procedures. Adult animals and nursing calves are not dewormed. Young, weaned animals are dewormed in the spring beginning as soon as grass comes out and three or more times at three to five week intervals.