Good quality fibre grows best on healthy well-nourished animals living peaceful lives. Illness appears to cause brittle, dry fibre that breaks easily, so do everything possible to prevent disease. Keep parasites to a minimum by keeping living areas and pastures clean.
Design and implement a comprehensive vaccination programme. Build a relationship with your local vet. Use every mechanism available to keep flies, midges and mosquitoes at bay. Prevention is always better than cure. A varied diet rich in minerals, vitamins, protein and dry matter as well as plenty of grazing time tends to keep alpaca content and healthy.