Yours was a very extreme Lenten fast indeed, the likes of which I have never heard of any Catholic doing, at least in the modern church. If you feel it was of benefit to you, good. It must certainly have been a strong bonding experience with others in the group, at least if those others were good, reasonable people. Odd, though, given how much self-effacement and compunction is involved, that the fast doesn't include telling others that you've done it among the things to be given up.

Odd too that even consciences that are "very alert," and shrink from condoning cruelty to animals, nevertheless are as if blinded, and fail to see that the very situation of exploiting enslaved animals, ending in an unwilled violent death, is inevitably cruel, no matter what the "humane slaughter" propaganda says.