Bunnys' chins contains scent glands, which they use to mark their territory, you and all things that they deem to be theirs. Think of it as your bunny going on his or her rounds, marking everything as 'mine, mine, mine....' Found on http://www.rabbithaven.org/behavior/
1) Enjoying a gabfest 
Bunnys' chins contains scent glands, which they use to mark their territory, you and all things that they deem to be theirs. Think of it as your bunny going on his or her rounds, marking everything as 'mine, mine, mine....'