Most pet insurance policies will not cover your pet’s pre-existing medical conditions, particularly pre-existing chronic conditions. That’s why you should insure your pet as early as possible before they develop health issues that will be treated as pre-existing conditions and excluded from cover. A pre-existing condition is an illness or ailment diagnosed before the commencement of your first policy period or during your applicable waiting period. Health conditions developed after that should be covered as specified in your PDS.