Will Yews Kill my Chickens?

Im adopting neighbors brutaly neglected chickens. Unfortunately I just realized that my yard is completely surrounded by Japanese Yew trees whose needles and berries are poisonous to humans AND CHICKENS. Google seems to think this is dangerous, but I can't find any evidence of chicken keepers having poisoning issues. Is this a big enough problem that I should avoid having chickens? I can't chop down 20 trees and there is no part of my property where I can completely avoid them.