Answer:
The word “sheep” is both singular and plural, so your sentence would have to change the subject to “sheep.” The word “deer” is the same way (one deer, two deer). For the plural, it should be, “Sheep are grazing in the field.” For a singular animal, it should be, “A sheep is grazing in the field.”
Answer:
The main theme if this poem is motherly love. One proverb in particular that relates to the poem is “Love never gets lost, it's only kept.” This proverb means love is a feeling you can never get rid of. This proverb relates to the poem with the mother's relationship with her child.