Step 1

In a slow cooker, add the frozen beef marrow bones and beef knuckle bones

Step 2

Next, add chopped parsley, carrots, and celery and surround the veggies around the beef marrow bones.

Step 3

Next, add the apple cider vinegar, then add cold water, leaving an inch of space. Add the fresh thyme.

Step 4

Cover the slow cooker and set it on the low setting for ideally 24 hours to get the most benefit out of the beef bone broth. You can also set it on the medium setting for 12 hours. Make sure to stir the bone broth occasionally.

Step 5

The bone broth will be bubbly and you'll be able to see fat solids starting to form. That's how you know the bone broth is done. Turn off the slow cooker. Remove bones and discard. Allow broth to cool. Never feed your dogs cooked bones.

Step 6

When cooled, remove the hardened fat layer on top. Remove vegetables and pour the broth through a strainer to remove bone fragments.

Step 7

Divide the prepared bone broth into freezer-safe containers and label them. Dog-friendly bone broth freezes well and will keep fresh in the fridge for up to five days and in the freezer for up to a year.