noun
deer crackers; rice crackers for deer
Specifically the crackers sold in Nara Park to feed the wild deer; a well-known local specialty.
奈良公園で鹿せんべいを買って鹿にあげた。
I bought deer crackers at Nara Park and fed them to the deer.
General rice crackers; 鹿せんべい is a specific type made for deer, not for human consumption.
Compound of 鹿 (shika, 'deer') and せんべい (senbei, 'rice cracker').