I just made my home made natural lavender spray to make my home smell amazing! (blog.freepeople.com)
I keep meaning to invest in lavender spray for my bedtime routine but didn't even think about little one. (naptimenatter.com)
Or you might try a spritz of calming lavender spray, or you could tuck a lavender sachet under the carrier's padding (so your dog isn't tempted to chew it). (cavalierrescueusa.org)