You should always assume your German Shepherd is at risk for heartworms. The heartworm can be easily transmitted through mosquitoes, which makes dogs and other animals very susceptible to the disease. The best way to protect your pup is to have him tested for heartworms at his annual wellness exams. You should also have him on a monthly preventive medication. This type of medication can come in the form of a chewable pill, a pill that needs to be swallowed whole, or most recently as an injection. Talk with your vet to find out if your German Shepherd is currently on this type of preventative. Heartworm disease has been diagnosed in all 50 states of the U.S. It’s presence is all around and should be considered a threat to your pup. Protect your pup and have him tested and treated monthly by your veterinary clinic Glendale, AZ.