A. Because the first ones were to be smashed.
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Q. From where do we learn that we can understand the primary purpose of an entity from the first time it s used in the Torah ?
A. From the letter Tes which is used first for Tov.
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Q. If 2 animals are similar to each other may we breed them together ?
A. If they are a different specie it is prohibited. Thus a wild goose may not be mated with a regular goose , but a wild ox with a regular ox is permitted. Rambam
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Q. What is considered a proper closure to for sheep ?
A. That which can withstand an average wind.
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