Anyone know if they used more than one dog for Freemont throughout the 4 seasons...... I'm starting to think they did, as I watched dog trainer last night and Freemont seemed a little lighter in color than in the previous episodes...Could have been the washed out film, lighting though.

Fremont - Wired Scotch Cairn terrier (played by Danny the dog) on the sitcom DENNIS THE MENACE/CBS/1959-63.
Fremont was the family pet of George and Martha Wilson (Joseph Kearns & Sylvia Field) a retired couple who lived next door to the mischievous Dennis Mitchell (Jay North). Dennis owned a dog named Ruff.

Danny the dog also appeared in the movies Anatomy of a Murder (1959), and Pal Joey (1957).