Street & Smith started their comic book lines in 1940, and gave it up (apparently not able to compete with the already-established publishers in the popular genres), in 1949. But they never seemed to give it a proper chance to succeed. I find it distressing, as a big "Funny Animal" fan, and secondarily, as a cartoony-art style, human-figure comedy comic book fan, that they tried only ONE funny animal comic line, and not even ONE other comedy comic book, - and that one funny animal line only lasted ONE ISSUE!!!
I guess they didn't have their hearts in it on the nuts and bolts level. One of the top brass saw how quickly the burgeoning comic book industry was expanding (selling like hotcakes), and decided his firm should get in on the easy profits. But, apparently, the company didn't have the right people in-house to make it work, nor did they hire the right people to get the job done.
The only series that lasted more than 20 issues were "The Shadow" - 1941-49 - 101 issues; "Supersnipe" 1942-49 - 44 issues; Super-Magician 1941-47 - 55 issues; and "True Sport Picture Stories" 1942- 49 - 46 issues.
Not surprisingly, they did well with their mainstay, sports. And they did fairly well with related "action series", including 2 20-issues soldier/combat series during World War II. Only "Supersnipe", their Sports series, and "The Shadow" (with the continuing great radio following) made it all the way to 1949. "Doc Savage" only made it to 20 issues from 1940 to 1943. I wonder why? They did so very well with "Doc Savage" Pulp books. They could have adapted all of them in serial form in the comics. I wonder why they cut the comic book series out so quickly?
Actually, the single children's funny animal book, "Kid Zoo Comics", from 1948, had good quality artwork, drawn by one-time animator, Vince Fago. And it also had a well-written, funny, and heavily action-based lead story. The other stories were also well drawn, but didn't have any plots. They were clearly written for little kids by people who didn't know what little kids would like, and weren't cleverly funny - not really funny in ANY way. It's too bad they didn't really give it a real try.