No.
No, only bull mastiffs.
ofcourse every dog is trainable you just have to be patient and calm
Most sea mammals are trainable. Most success has come with dolphins.
Mastiffs, Fila Brasileiros, and Neapolitan Mastiffs are all working dogs. Mastiffs originated in England, Fila Brasileiros in Brazil, and Neapolitan Mastiffs in Italy. Neapolitan Mastiffs are typically the most expensive and the largest, followed in both categories by Mastiffs and Fila Brasileiros. These breeds all have dense coats that are easy to groom and shed moderately.
Yes
yes octopuses are trainable because they are very smart creatures. even smarter than us.
yes
There are several easily trainable dogs, but the Labrador Retriever ranks number one on most lists.
All dogs are trainable , no matter what age or breed. If you honestly have to ask this question, you shouldn't be considering rescuing an animal.
yes english mastiffs shed hair but extremly little to the extend where you probably wont find it.
Able to be trained