The Last of the Super-Pets !

The fourth Super-Pet is a friendly, telepathic blob from Antares named Proty II. He's Chameleon Boy's pet, and has the same shapeshifting powers. He's Proty Number Two because the first one croaked bringing Lightning Lad back to life. Look it up!

Our last Super-Pet is Streaky the Super-Cat, who like Comet is a "pet" of Supergirl. As revealed in a storyline in Action Comics, Linda Lee, still incognito as Superman's "Secret Weapon," was trying to come up with a Kryptonite antidote by, basically, pouring a series of chemicals (long-distance via super-tongs) onto a piece of Green K.

Now, this must have been MUTANT Green Kryptonite, because, unlike EVERY OTHER piece of Kryptonite in the univers, THIS PIECE was reduced by atmospheric friction to marble size. Since Super-Creator Jerry Siegel wrote these tales, I guess nobody told him that DC had a "Kryptonite continuity rule," as stated in Superman #130: When passing into our atmosphere, Kryptonite "didn't burn up in Earth's air like ordinary meteors because Kryptonite can't combine chemically with oxygen, which cause combustion."

So, when this marble-sized piece of mutant Green K was experimented on by Kara Zor-El, nothing happened. That she noticed, anyway. Actually, "by a strange twist of fate," the Green K's properties were changed to turn it into "X-Kryptonite." Another strange twist of story-telling fate got that small piece of Green K (oops, "X=Kryptonite") into a ball of yarn that -- just by coincidence, mind you -- was being played with by the stray cat adopted by Linda Lee, which she'd named "Streaky" because of the zigzag on his side.

And now we come to the end of this subhuman tale. The art for the Super-Pets is from a story with art by Pete Costanza. The Superboy cover was drawn by the NEVER EXCEEDED Curt Swan.