Note that Elsie was the cow, Elmer was the Bull.
Recognize the face from Elmer’s Glue-All...? It was originally a Borden product. (*)
https://archive.org/details/dmbb05529
(*) Why you’d have the picture of a bull on a bottle of a sticky white unidentified liquid, is best left to the experts...
I am NOT a cow; but some here claim I am full of bull!