Horse
In Ezekiel 26:11, this signifies the love of learning or intellectual things. (Arcana Coelestia 3727)
In Revelation 6:2, this signifies the love of understanding the Word. (Apocalypse Revealed 298)
In Zechariah 12:4, this signifies that the intellectual should be filled with falsities. (Arcana Coelestia 2383[2])
In general, 'a horse' signifies knowledge or understanding of the Word. In an opposite sense it signifies the understanding of the Word falsified by reasonings, and likewise destroyed from self-derived intelligence. 'A dead horse' signifies no understanding of truth from the Word.
Jeremiah 34:17
17
Therefore thus says Yahweh: you have not listened to me, to proclaim liberty, every man to his brother, and every man to his neighbor: behold, I proclaim to you a liberty, says Yahweh, to the sword, to the pestilence, and to the famine; and I will make you to be tossed back and forth among all the kingdoms of the earth.