Paw of Puppy Annotated With Toe Numbers
Toes of a Dog's Paw

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Outer Toes
1. Toes that are located outside other toes. Some authorities refer to toes II and V of cats and dogs as outer toes because they are located outside toes III and IV (the inner toes).


2. Toes that are lateral to other toes, being on the outer side of the foot. In this sense, toe V is the outer toe of feet of dogs and cats, and toes II to IV are medial to toe V, being on its inner side.   
Cf. inner toes.