BioMax Biological Media: Promotes healthy bacterial growth for improved biological filtration

E8 (Selenium): 0

Battery: replaceable PetSafe RFA-67 6V (sold separately)

which may help to prevent calcium from binding to the teeth and a special kibble

so your pet can enjoy more freedom outdoors

PetSafe Wireless Pet Containment Add-A-Dog Extra Receiver Collar royal canin dog food BioMax Biological Media: Promotes healthyPetSafe Wireless Pet Containment Add A Dog Extra Receiver Collar The PetSafe Wireless Pet Containment Add A Dog Receiver Collar lets you add another dog to your Wireless Pet Containment System (PIF 300 21), or replace an existing collar. This waterproof, adjustable collar uses a warning tone followed by safe static correction, so your dogs can enjoy the garden while staying within their boundary. Comfortable and reliable, it lets all your pets play