i think your ok if you get two diff bloodlines an make them. the t + or caramels kink when you breed siblings back to parents once or twice its ok. 5-6-7 times is when you start getting issues down the gene pool.

ive made super cinnys from a pair of siblings with no issues. healthy babies, its hard to justify kinks from inbreeding or incubation error. i say go for it if you want them