Let me preface this by saying we parent gently...
DD is apparently a biter. I've been told twice now that she's bitten or attempted to bite other toddlers in day care. The two times she actually bit a child, that child (the same one) put her finger in DD's mouth first. But the other attempted biting incidents, she's grabbing a child's arm and actively trying to bite him/her.
She rarely bites us at home, so I don't have many opportunities to discuss/redirect with her. She's mostly non-verbal (her only words are "Daddy," "doggie" and the occasional "Mama") and the center director said that children, when learning to talk, will sometimes bite.
The day care teacher's advice to me was to "bite her back." That's not going to happen.
So, any (gentle) ideas? I've actually sat down and talked to her about how we don't bite our friends and tried to (yes, I am crazy) teach her the word "No," so she can use it (apparently several of these incidents occurred when a baby tried to take away a toy she was playing with). She's still not there yet with "No," and I suspect her biting (and the temper tantrums she's been throwing recently) is frustration with being non-verbal, as right before she walked she was throwing tantrums too.