2nd day of Week 28 (the "Pig") and the 44th day (the "Mouse") of the 4th cycle ("Netzach"), Gevurah shebeMalchut shebeNetzach, Might/Discipline within Kingship within Victory/Endurance.
Comments/Perspectives: It's interesting to note that in all of Perek Shirah there are only two animals that come in a pair: the Cat and the Mouse, which cover the 9 Days of Av. The previous two, the Fox and the Hound also appear to be pair, but that connection is not explicit. These are the animals that cover the Three Weeks of Mourning, which is the basis for the Cycles of 22 days (and the pairs in each cycle) below.
Alef-Bet/Psalms (Cycles of 22 days):
Comments/Perspectives: Peh and Samech are the firtst two letters of "Pessach,"
The Lord has trampled all my mighty men in my midst, He summoned an assembly against me to crush my young men; the Lord has trodden as in a wine press the virgin daughter of Judah.
סִלָּה כָל אַבִּירַי | אֲדֹנָי בְּקִרְבִּי קָרָא עָלַי מוֹעֵד לִשְׁבֹּר בַּחוּרָי גַּת דָּרַךְ אֲדֹנָי לִבְתוּלַת בַּת יְהוּדָה: