If you have a premium account, and look at the pedigree, it shows that, in order to not be classified as in-bred, the furthest back they log is great-grandparents, so like Sumatra said, as long as they don't share grandparents, or are related within 3 generations.
Exaample is:
If I bred Raxac Ratpor: http://beastkeeper.com/pet/339413 with Silvery Blue http://beastkeeper.com/pet/534593 it'd lead to a degeneration, because he is her grandparent (sire of Ugh-Names, her father), but if I were to breed her daughter with him, then there would be no degeneration.
If we were to use your pets as an example:
http://beastkeeper.com/pedigree/511738 (Kalmia) http://beastkeeper.com/pedigree/529144 (Oleander) would lead to a degeneration, because Tou is Oleander's grandfather, but you can breed Oleander's son with Kalmia, as long as you don't breed someone related to Kalmia with him :P
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