Usually achieved with horses by cold hosing or with ice boots, dogs you can use a bag of peas or ice pack. This is one of the most cost effective and efficient therapy for an owner and animal to achieve improvements for acute swelling or inflammation. It works by constricting the blood vessels, which decreases blood flow to the area. It also provides a natural analgesic effect regulated by the peripheral nervous system. It can also reduce muscle spasms through the temperature decreasing the muscles ability to contract.