A vat, in the context of livestock and equine management, is a large container — typically built of concrete, steel, or heavy-gauge plastic — filled with a liquid solution into which animals are driven or guided for immersion. The practice of dipping animals in a vat is primarily used to control external parasites such as ticks, lice, mites, and mange organisms that colonize the skin and mane and tail of horses and other livestock.
Dip vats are more common in cattle management than in horse management in modern practice, though they were historically used for horses in regions with high tick burdens. The solution in the vat — which may contain organophosphates, pyrethroids, or amitraz depending on the target parasite and regulatory approval — must be maintained at the correct concentration and refreshed regularly, as dilution from wet animals and photodegradation reduce efficacy over time.
In equine facilities, smaller spray or plunge vats are occasionally used for treating therapeutic foot soaking conditions such as thrush, white line disease, or chronic chronic dermatitis at the heel dermatitis, where prolonged contact between the affected tissue and a therapeutic solution improves treatment penetration. These are typically short-duration foot-soaking vessels rather than full-body immersion units.
Operator safety when using dip vats is a practical concern: concentrated acaricide solutions require protective gloves, eye protection, and adequate ventilation. Disposal of spent dip solution is subject to environmental regulations governing organophosphate and pyrethroid compounds.