Mature goldfish will also explore their surroundings through nibbling or grazing behaviour. Boreout can lead to eating disorders such as untimely nibbling or loss of appetite. Alice returns to normal size after nibbling from a mushroom guarded by the Voracious Centipede. Courtship involves bowing, billing and nibbling. The final scene shows Cookie Monster at the cookie shop nibbling on Cookie's breasts. Who's nibbling on my little house? They remove dirt and oil and realign feather barbs by nibbling their feathers. Mating typically starts with one slug following the other, periodically nibbling its tail. This courtship period is characterized by billing, bowing, and nibbling. The nibbling process cuts a contour by producing a series of overlapping slits or notches. Nibbling of the face and neck is observed during greeting ceremonies. At around five-days-old, the foal is already nibbling grass. When in its hatchling form, Terry enjoys nibbling on Dr. Z's beard. They were capable of bit-by-bit copying, also called "nibbling".