Temeraire is a special case. He is one of only eight Celestial dragons in the word, and they seem pretty adamant that he should be partnered with someone from the royal family, and should be engaged in pursuits more suited to his kind such as poetry, as opposed to fighting in a war with a man like myself.
I'm still trying to figure out why, if they were so concerned about it, they sent him off to Napoleon in the first place.