Sauce is a personal pronoun, indicating intimacy. Generally, only friends who have a very good relationship will scold each other about dogs, which is roughly the case.

"Sauce" belongs to the network language and is a word derived from the suffix "ちゃん" (pronounced chan) in Japanese. No matter whether the speaker is male or female, and whether the other person is male or female, you can say this about the other person, but generally you can use "sauce" for people who are very close. The word "sauce" is often used for lovely girls, giving people a feeling of intimacy, but it can be used not only for lovely girls, but also for other things, such as babies and kittens. Even for men.