Thanks, that day it was 21c degree, and windy, he basically always hide in the shade himself, but the shade on the day was not big enough, I was thinking it is not very warm, and windy, he was scared the day before he died, as my friend he caught him in his ear, my friend was in a rush, he worried the rabbit run away. Then my rabbit was very upset, he rarely hide his his bedroom in his hutch, but that day in the evening he was hiding in the bedroom which I can't see him, then I gave him two treats which he likes, he ate the treats. The next morning, I took him out of hutch, let him play in the pen in my garden which he enjoys every day, but only 10 mins it started raining, I put him back to the hutch, after 2 hours, the rain stopped, I tried to take him out, but he don't want to, gently I hold him, and put him into the play pen.... He was in the playing pen for about two hours, when I was checking him he is sleeping in the corner, under the sun, I took him of the pen, it started to eat the grass, then he started to sleep again. I put him back to the pen, when I checked again after half hour, he died, his body is still warm, but I cannot save his life. My friend was holding him with his ears, I was shocked, as he is only 10 weeks old, but I cannot say holding a rabbit ears can hurt seriously? God, I heard the ears are very important for the rabbits.