Rich in oil content and highly nutritious treat the goldfinches in your local area with one of their favourite foodsr please note that the 25kg sacks of niger seed are delivered as 2x 1255kg sacks and 50kg as 4x 1255kg sacksr type of feeder to use r thistle feederr birds that you may attract with niger seedr collared dove goldfinch greenfinch redpoll siskin turtle dove