The day started out as a normal day for the apple family but as a strange dog bits Apple bloom she starts to have cravings for meat and hears noises that no pony else can hear.
It's up to Twilight and Applejack to fix this problem before the third full moon or Apple bloom will be a werewolf forever
Nice job. A few misspelled words, and it would have been nice to see a little more description of certain events, but overall, not bad. I like it.
I believe the word you're looking for is lycanthropy
Story could use a little more meat on its bones but it's a really good premise.