9. i6
Bulldog chess - Cat & Mouse - captaintugwash vs Fly-Eagles-Fly

Indeed, and C for cat is also fine since we have no chancellor, although it might take a few cat moves before I subcosciously think cat! In a game with cats and chancellors, I guess F for feline, but whatever.
Also, it's worth at this point noting that if play continues 11. Cg3 Mf6 12 Bxg6, the bishop is not putting you in check since it moves next to the mouse. However, the bishop can capture the knight, because it isn't currently next to your mouse. I wouldn't be able to play 13. Bxh7 though, not unless your mouse moves away.
11. Cg3
9. cxd3