Victoria Silverwolf
Vegetarian Werewolf
I have just started a trilogy of comic fantasies for kids by Mary Rodgers. The first one will be familiar to you. The books are Freaky Friday, A Billion for Boris, and Summer Switch. (1972, 1974, and 1982.) Interestingly, in the first one, although the daughter finds herself in the mother's body, the mother's mind is not in the daughter's body (at least not yet.) Right now, the daughter's body still apparently has the daughter's mind (although, confusingly, those two minds seem to be entirely separate ; they don't communicate, and the daughter-as-mother has to act as the parent of the daughter-as-daughter, if you see what I mean.)