Alfalfa weevils developing resistance to a given pyrethroid runs the risk of developing cross-resistance to all mode-of-action group three insecticides.
Obesity in horses is never a desired condition, but especially so for animals that have developed equine metabolic syndrome (EMS), a condition similar to Type II Diabetes in people.
Internal parasites in sheep and goats can be especially serious threats to animal health and production, and the barber pole worm is the worst of the lot.