Parasites are ubiquitous in any animal environment, regardless of the husbandry practices and the season or time of year. Just as in domestic cats and dogs, carnivores and other animals such as sea lions are susceptible to heartworm disease and must be placed on a monthly preventative. Hoofstock are at special risk for parasites in the environment since in most zoological institutions, they cannot be moved to other pastures due to lack of space. Medicated feed and other anti-parasitics are utilized to help with this problem.