It's saying the same thing but the proper translation for "The girl likes all animals" should be: "Das Mädchen mag alle Tiere." "Tiere" is the plural form and should be used in conjunction with the word "alle".
It's a correct translation of the meaning (semantics). The site seems to want a word-for-word translation at the moment, though. We'll see if they widen the accepted answers to include that translation in the future.