My first bird had foul weather and just was unstoppable. I didn't even know weather changed throughout the track. I never noticed a difference in the bird's performance and wondered what the weather preference even did. Everyone kept saying my bird was a beast. Now I know why, since three birds after and all of them have burnt through much more than stamina even when its sunny. Racing's been a super long grind with out all those first places anymore. Foul preference ftw.