What the pluck is that? Still lifes of chenille chickens posed in modern scenarios from artist Sloane Tanen's new book, ''Bitter With Baggage Seeks Same: The Life and Times of Some Chickens.'' Why chickens? ''You can just project anything onto these guys because they're so blank,'' says the NYC-based Tanen. ''They don't look like they're saying anything, but when you read the caption, it's like suddenly that's exactly what they're thinking!'' What's the appeal? The juxtaposition of poultry and ''Cosmo''-girl musings, as in the caption above: ''Maude was peeved. Her 3:30 yoga class was full again.'' Other pics include send-ups of high-end shopping, the Atkins diet, and Jewish dating.