Peter doesn't know that the cows are the TARDIS's doing, but he certainly notices when a couple of them deliberately turn on him. One butts him in the stomach, thankfully without much momentum, and another shoulders him aside on the way to gather by the TARDIS.

"Fuck!" squawks Peter as he loses his balance and goes down amongst the cattle. As one is about to plant a hoof on his chest, though, a little spout of flame shoots up between the bovines and Peter reappears at Gabriel's feet, for once ending up nearly where he meant to go.