[1] Yeagle began his animation career in a small studio in Philadelphia with a summer job, giving him his first taste of the industry.

He served four years in the Navy during the Vietnam era, and later worked for Jack Zander (who once animated Tom and Jerry cartoons for MGM) in Zander's Animation Parlour, New York.

[2] Seven years after starting at Zander's Animation Parlour, Yeagle began freelancing, working for most of the New York animation studios before starting his own, Caged Beagle Productions, in 1986 with Nancy Beiman.

Caged Beagle produces TV commercials, CD-ROMs, sub-contracts or consults on features and character design.

[3] Yeagle's clients have included Blue Sky Studios, Broderbund, Dannon, Grey Advertising, Hanna-Barbera, Holt, Rinehart and Winston, ImaginEngine, Kraft, Marvel Comics, Nestle, Playboy Enterprises, Procter & Gamble, Random House, Saatchi & Saatchi, Walt Disney Productions, Warner Bros. and Western Publishing.