He trained several animals for television programs and movies, including the dogs in the Benji series and the cat Orangey.

After Juanita's death, Inn retired and devoted his time to writing poetry, assembling a museum of memorabilia from his long career, and training a new generation of animal wranglers.

His first professional work was as an assistant trainer of Skippy, the dog who played Asta in the Thin Man movie series.

In the early 1950s, Inn left the Weatherwax animal training organization and began to work as an independent trainer.

His animal stars included Orangey, a cat who was in the films Rhubarb (1952), The Incredible Shrinking Man (1957), The Diary of Anne Frank (1959), and Breakfast at Tiffany's (1961), and appeared in the television series Our Miss Brooks with Eve Arden, and in Batman as a cat belonging to Eartha Kitt's villain Catwoman; Cleo, a basset hound who was in the film Bell, Book and Candle (1957) and in Jackie Cooper's 1950s television show, The People's Choice; Arnold Ziffel, the pig from Green Acres; the chimps from Lancelot Link, Secret Chimp, the dog and two cats from The Secret Lives of Waldo Kitty, Tramp the dog of My Three Sons and many of Elly May Clampett's exotic "critters" on The Beverly Hillbillies.

He portrayed a studio security guard (uncredited) in Mooch Goes to Hollywood in 1971, appeared as himself in Benji the Hunted in 1987, and played a cook in the 1976 camel comedy Hawmps!.