[It's ???'s turn to look mildly offended as he reaches the fence.]

Of course she does. She's been with me for awhile. [She's rather small for a cow too, but that doesn't matter to either of them. The cow will just nuzzles his hand when ??? reaches out to her, finally moving to sniff at his face afterwards.]

Or, I don't know, maybe she's a magic cow. She's pretty friendly though. [While he's rubbing her neck, the cow turns her head to look at Draco, blinking at him and trying to get a sniff as well.]