Database: dog_kennels
Question: List the names of the dogs of the rarest breed and the treatment dates of them.
SQL: select t1.name ,  t2.date_of_treatment from dogs as t1 join treatments as t2 on t1.dog_id  =  t2.dog_id where t1.breed_code  =  ( select breed_code from dogs group by breed_code order by count(*) asc limit 1 )