http://articles.mercola.com/sites/articles/archive/2005/04/13/pets-heartworm.aspxBy Steve Brown and Beth Taylor Minimizing toxins is one of the foundations of our "Live Longer" program in which we use only those medications, preventatives and treatments that are most useful and necessary. With careful evaluation, some "approvedenCommunityServer 2008.5 SP1 (Build: 31106.3070)