* Dew claws are the small, high-set claws located on the inside of a dog's front legs.
* They are vestigial, meaning they are a leftover structure from a past evolutionary ancestor.
* While they may have some minor function in balance or traction, they are often removed for cosmetic or health reasons.
However, it's important to note that some breeders may choose to remove the dew claws on Mastiff puppies shortly after birth. This is a personal choice and some breeders believe it is beneficial for the dog's health, while others believe it is unnecessary.
If you are considering a Mastiff, it is important to discuss the dew claws with your breeder and make an informed decision about whether or not you want them removed.