The Bullmastiff is a big drooler, so if you're disgusted by slobber spots on your clothes, you should choose a dog from another breed. The Cane Corso drools quite a lot, so if you dislike being covered by slobber spots on your clothes, you may want to choose another dog breed. Reproducibility - Bullmastiff vs Cane Corso . Gestation Length : 60-64 days : 60-64 days : How often can the have a litter? Once a year. More frequent breeding is not healthy. Once a year. More frequent breeding is not ...