Hey MaruPrime7172! For imprint usage Vulpaphylas count as Kavats and Predasite count as Kubrows.

Incubator > Kavat Breeding > Begin Incubation > Combined Incubation > Select your two imprints

Make sure you have enough Kavat Genetic Codes and an Incubator Power Core otherwise the "Begin Incubation" button will not show up.