I have seen you guys go out on a limb before in usually futile attempts to justify these sorts of things but you really took the cake on this one.
First, who said it was after the Mass?

I don’t recall seeing that anywhere. It could just have easily been in the Mass as was the Chicken prancing around just prior to the Gospel acclamation. But since many charismatics use that time for “spontaneous” bursts of praise, I guess maybe these days it is kind of a free period, a recess so to speak in the Mass
Quite true the Chicken was not dancing. Mea maxima culpa. Prancing would be a better term I guess and starting to move down into the congregation as the video ended. As to chickens figuring prominently in several Gospel stories, so do adulterers, beggars, the blind, the lame, thief’s, Roman Legionaires, prostitutes and the dead. I didn’t see them being put on display in an attempt to rev up the congregation, nor have I ever.
And exactly what context does the chicken play in the Liturgical system in Mexico? As a catechist in San Diego, California for many years, I attended many many Latino Masses, in San Diego, Tijuana and other towns on the Baja Peninsula in Mexico… Never saw a chicken though, except for dinner or at a cockfight. Maybe it’s new, huh?.
Well at least they didn’t have la Santissima Muerte up there waving it’s scythe around.
But I wouldn’t be surprised if it happens, nor would I be surprised at progressives jumping up to defend it. They defend just about everything else.