7. You may say that yet, it is written: "And let birds fly above the earth" (Beresheet 1:20), from which sacrifices are offered and even burnt offerings, as written: "And if the burnt sacrifice for his sacrifice to Hashem be of birds" (Vayikra 1:14). THUS, "CATTLE" IS NOT ACCURATE, AS YOU EXPLAINED. HE ANSWERS: Come and behold. Of all the birds, only turtledoves and young pigeons are offered. There is a secret to it, which is that what is fit in the one is unfit in the other. THE COLOR RED IS SUITABLE FOR TURTLEDOVES, BUT NOT FOR YOUNG PIGEONS. THE REASON IS THAT THE YOUNG PIGEON is the right and THE TURTLEDOVE is the left. HENCE, RED IS SUITABLE FOR IT, WHICH ALLUDES TO THE LEFT COLUMN, and all is one.
7. וְאִי תֵּימָא וְהָא כְּתִיב וְעוֹף יְעוֹפֵף עַל הָאָרֶץ, דְּהָא מִנַּיְיהוּ מְקָרְבִין קָרְבְּנָא, וַאֲפִילּוּ עוֹלָה, כְּמָה דִּכְתִּיב וְאִם מִן הָעוֹף עוֹלָה קָרְבָּנוֹ. תָּא חֲזֵי, מִכָּל אִינּוּן עוֹפִין לָא מְקָרְבִין אֶלָּא מִן הַתּוֹרִים אוֹ בְּנֵי יוֹנָה. אֶלָּא רָזָא דָּא, מַה דְּאִתְכְּשַׁר בְּדָא, פָּסִיל בְּדָא. דָּא יְמִינָא, וְדָא שְׂמָאלָא, וְכֹלָּא חַד.