Canine Distemper-Adenovirus Type 2-Parainfluenza-Parvovirus Vaccine, Modified Live Virus, dogs 6 weeks or older. Preservative: Gentamicin.Shipping charges for refrigerated items are a flat charge based on your location or zone. Cold items are packed on ice and shipped separately in a cooler with expedited shipping. Med-Vet ships cold items Monday-Wednesday only. Next day air available for additional charge.