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How to fill a dog's stocking for christmas
Buy a prefilled stocking.
Many pet supply stores sell these during the holidays, and they can be a great option. However, they should be opened for your pet as most of these stockings are made of clear plastic so the buyer can see inside.
Make sure the stocking stuffers are appropriate for your dog's size. If you want to get a dog stocking for a pet owner, the prefilled variety is likely your best option.