|“||As my grandpappy Old Reliable used to say... uh...Don't recollect if I've ever mentioned Old Reliable before. (Jock: Aye, you have, laddie.)||„|
Trusty is the neighbor of Lady, and possibly the oldest dog in the film. According to Jock and himself, he was once a service dog working alongside his grandfather, the esteemed Old Reliable, to track down and capture criminals before eventually having his age catch up to him, which is when he supposedly lost his sense of smell for a number of years. Though Trusty firmly believes his strong sense of smell remains intact, Jock believes otherwise (though he refuses to admit it, not wanting to hurt Trusty's feelings).
Now retired, Trusty spends his days alongside his best friends, Jock and Lady, who hold a strong kinship with the old dog.
Trusty can usually seem absentminded and a little clumsy, but is a loyal, sweet and respectful friend to Lady and everyone else. He has a large way with manners referring to Lady as "Miss Lady, ma'am." He can also be a blabbermouth, and regularly connects a story or topic to a piece of advice given to him from Old Reliable, with a statement going as followed: "As my grandpappy Old Reliable used to say, uh... Don't recollect if I've ever mentioned Old Reliable before," to which his friends would reply by stating he has.
At the very end when Trusty about to tell it to Lady and Tramp's puppies, he realizes that he's completely forgotten what Old Reliable said to him now (as such, we, the audience, never actually learn what the advice was).