If one increases the head to 15 st, it looks like a mouse.
Made two mice and two bunnies.

Mouse Ears adaptation:
CO 10.
Purl one row.
Cut yarn, long tail.
Pull yarn tail thru all stitches to gather tightly.
Secure yarn and attach.

Mouse Tail:
CO 3.
Work 20 rows I-cord.
Cut yarn, long tail.
Pull yarn tail thru all three stitches and gather tightly.
Secure yarn and attach.

Bunny tail:
3.0 mm hook
r 1: MR 6 sc. (6)
r 2: 6 sc inc. (12) Stuff lightly.
r 3: sc around. (12)
r 4: 6 sc dec. (6) F/O, long tail.

Bunny head modification:
After increases to 12 st were made, worked 7 rows even vs 5 as written. The nose area is more rounded that way.