Instruct: Classify the given review as either positive or negative.
Query: Doesn't Work

I have a problem with red squirrels and chipmunks. It keeps the fatter squirrel off the feeder, but the skinnier two just snake their hands in and snatch out the seeds. It doesn't stop the chipmunks at all; they're too small to trigger the weight limit. The fat squirrel sits at the bottom eating the seeds knocked down by the two smaller ones having to work so hard.Worse, because it takes the squirrels more effort to get the seeds, they spend twice as much time working at the feeder. The seed doesn't go down as quickly but there's no chance for birds to come feed.This might work for heavier gray squirrels but it's a total bust for red squirrels and chipmunks.