[2020] Riot copied art for the "Playful Pup" emote

When looking at the emote store, I noticed that the art in the "Playful Pup" emote looked very similar to art that I had seen before.

To confirm, I made some quick google searches and found two of the pieces of art that match two of the heads of the emote nearly exactly with only small changes being made and a recolor.Here is my comparison: https://i.imgur.com/ULLhyyd.png

I was unable to find the original sources of these two drawings, so if someone finds the original artists I would love to put their links in this post.

EDIT: Found the middle head. Here's a comparison after a small edit: https://i.imgur.com/2Qp0ooX.png

Also, for anyone who isn't convinced, here is the original emote next to what you get if you combine all three pieces of art into a recreation of the emote. https://i.imgur.com/rg6udWR.png

EDIT2: Source for the artist of the rightmost head: https://starfishey.tumblr.com/post/64901540721/so-due-to-popular-demand-i-decided-to-make-a
(Thanks u/SlurpTurnsMeGreen!)