That is so cute, I buy my little ones marrow bones or beef femur bones. I ask the butcher to slice them for me and they slice them into 2 inch bones for me. I buy a whole package and freeze them, and take out as many as needed. The rest stay frozen until needed. Then I take them and boil them for a few minutes, then remove excess fat from them before giving them to my babies. That way they don't get all gross (the bones and the babies). The quick boiling won't cause splintering, but does remove some bacteria that might be on them. If your babies aren't used to eating beef, then I would suggest starting them out slowly with the bones, let them have it for 30 minutes the first time. I then place it in plastic bags and refrigerate until the next day. It keeps their teeth sparkly.
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