Sun Mote Copse Jimmy goes to space.

Bronco had to stop and shake his head, side-stepping as it took him a moment to catch his balance. His mother had told him once before not to headbutt. She'd only said it once- but she'd said it with some amount of gravitas which had been lost on him at the time. What he didn't know was why his mother was so adamantly against using headbutts as a form of combat- not knowing, of course, that it had only taken one bad concussion to cause some pretty drastic repercussions not only for Niamh, but for Screech and Towhee as well. But Bronco knew none of that- all he knew was that it made him dizzy for a minute, so he thought he understood maybe why his Mom had discouraged it- but then he realized what he'd done to Towhee. 

Upon seeing her wheeze and gesture for him to hold off, Bronco felt his heart suddenly plunge in his chest, and he slumped to the ground in submission. He regretted the stupid notion immediately- why didn't he listen to his Mom? He crawled toward Towhee, uttering a soft whine of concern as she fought to get her breath back, and once he'd reached her, he turned over onto his side, leaning his head against one of her forelegs and curling his forelegs to his chest in a sincere display of apology.