Comic Title: Action Comics #277
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1961
On Sale Date: April 27, 1961 Copyright Date April 27, 1961
Source: Library of Congress, Periodicals 1961

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "The Battle of the Super-Pets"
Pages: 12

Feature(s):
Supergirl (of Earth-1)

Writer: Jerry Siegel
Artist: Jim Mooney

Reprinted In:
Action Comics #373 (1969)
Supergirl Archives Vol. 2 HC (2004)
Showcase Presents:Supergirl Vol. 1 TPB (2008)
Supergirl:The Silver Age Omnibus Vol. 1 HC (2016)
Supergirl:The Silver Age Vol. 1 TPB (2017)
Tails of the Super-Pets TPB (2022)

Feature Character(s)

• Supergirl (last appearance in Action Comics #276; next appearance in Action Comics #278)

Guest Star(s)

• Krypto (last appearance in Action Comics #276; next appearance in Action Comics #278)

Supporting Character(s)

• Streaky (last appearance in Action Comics #271; next appearance in Action Comics #279)
• Superman (last appearance in Action Comics #277; next appearance in Detective Comics #292)

Villain(s)

• A round bouncing creature (no further appearances)

Guest Appearance(s)

• Super-Monkey (last appearance in Superboy #142; next appearance in Adventure Comics #293)

Other Character(s)

• Mr. and Mrs. Morgan (a young couple; no further appearances)
• The mayor of Metropolis and an art teacher (no further appearances)

Cameo Appearance(s)

• Mr. Mxyzptlk (in a photograph)

Synopsis:
Krypto helps Supergirl protect herself from being adopted which wins her favor. Streaky is jealous of the canine and when he regains his powers begins fighting with the Dog of Steel. Superman and Supergirl arrange a competition between the two animals.

They take the rivalry to an alien planetoid and compete in a series of events. Krypto and Supergirl fall in a hole and land near some Kryptonite. Before Streaky can rescue them, the cat loses his powers, however a wish from Supergirl makes the Kryptonite harmless. They soon discover that the planetoid is a playground for Mr. Mxyzptlk. The hole was really a wishing well, which allows Supergirl’s wish to come true. Streaky and Krypto become friends, but the arrival of Super-Monkey starts a new rivalry.