The glass sliding doors and windows facing my back porch are non-reflective, so we haven't had any birdstrikes. However, we do have a bird feeder on the porch which attracts a lot of birds (mostly house finches
) and when we first got it one of the cats got so excited she sprinted after the birds and didn't put the brakes on fast enough to stop before face-planting into the sliding door. It was like something out of a Roadrunner
cartoon with her forward momentum and the slippery tile floor working against her as her little legs tried frantically to stop. She was fine, but she learned to sneak up to the sliding door rather than rush at it.