Some Weird Pet Event?

What did you do with all them? ._.

I don't have the Multi-Pet skill. And I don't see the point of using the pets that expire.
So then I have Four Perms.. my Baby Tiger, and three White tigers (one of which is my first pet, leveled up)

I suppose I can distribute the Four pets amongst my four main characters then.. though I wish I could Multi Pet the White Tigers and get the effect..
Does the Multi Pet skill only work on one character?

Yes it will only give you the multi pet skill on one character per pet snack you get.