Very similar to the one previous to this one, but using a hard boiled egg.
Ingredients:
Kibble
Hardboiled egg
Put some kibble in the kong, slice a hard boiled egg in half. Squeeze halves of boiled egg into mouth of kong. The egg's rubbery texture does a great job not letting the kibble out too easily, while resisting being pulled out of the kong, but also enticing the dog to keep trying.
