Dogs don't smell the cannabinoids, they smell certain terpenes and oxidized compounds associated with the cannabis plant that are volatile and that dogs happen to have a high sensitivity to.
The long and short of it is, if they are cannabis capsules made with natural hash oil, you run a risk of detection, as the traces of scent compounds will slowly diffuse out of the gelatin.
BL isn't here to help you smuggle drugs past security though.