I don't see any foxtailling on your plant, just big bud that are still blooming (I call it "overbudding"). ^^
You can usually limit over-flowering by lowering level of nutrients in your fertiliser programme.
Foxtail is when the calyxes stack on top of each other like ears of wheat, instead of forming conical buds. It's a genetic mutation.
Take a look at the pictures in this thread: https://www.thcfarmer.com/threads/foxtail.54898/