Factors Contributing to Dagginess in Sheep

Gastrointestinal parasites (roundworms)

• Species and site of infection (abomasum, small, large intestine)
• Worm numbers
• Intestinal mucous secretion

Parasite larval challenge

• Ingestion of larvae, previous exposure, "resistance"

Fungal endophytes

• Concentration of endophyte in herbage
• Type of endophyte/active agents

Diet/Physiological state

• Level of intake, feed quality, grazing horizons (which affects intake of parasite larvae or fungal endophyte)
• Lactation/late pregnancy resulting in rapid passage of digesta
• Body condition; poor condition/poor nutrition
• Susceptibility to toxins/parasites

Other

• Combined effects (e.g. larval challenge with endophyte)
• Tail length, rear end anatomy, wool length
• Changing diets, grain feeding can encourage diarrhoea
• Other toxins affecting increased smooth muscle activity

Return to Romani Homepage