I finally got my little Emy to accept her harness, so I like to take her outside every chance I get. Its been so hot here, 98-99, and we have a paved concrete circular driveway that is white in color, but by the time we get halfway around it, she's panting....I don't want her to overheat, but I have to take her out....don't I?...How hot is too hot for a 13 week old...I like to take her out in the morning when its cool and she's ok..but in afternoon, I always end up picking her up cause I get worried about her being black and all.