1 On average, a vet is going to charge anywhere from $150 to $600 to euthanize a horse. 2  The prices can be lower if they do not have to come to your residence. 3  For the full package that includes in the hauling, vet fees and drugs, the costs can range from $400 to $1,000. If the vet has to come to the home, a farm call fee will be added. 2  This fee can cost anywhere from $30 to $100. 3  If you live outside of their driving radius, a fuel surcharge per mile can be charged. 4  Hauling the horse away can pose additional fees, too. 5  The cost to have the horse hauled from your home can be extra.