I know they aren't standard but I'm not aware of any health risks associated with them. We have a few breeders here, I'm sure one will post. Good luck in your search and welcome to YT!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226