Drooling chicken?

[jessthesheepy]

When I was with my Sussex Star today I noticed that she drooled a couple of times and my buff kept pecking her beak which she never normally does, my Sussex Star is behaving normally and laying/eating/drinking normally so I might just be being paranoid but it's better to be safe than sorry

Any ideas on what's going on?(she is a year old)
Thanks, Jess.