If a puppy has a good bond with the human race mostly it can be trained. The key to training is relationship, to build up a working partnership between dog and handler. But there are dogs that do not work well in classes. Some are very protective and will not let anyone near their owners. Others want to pick a fight with every dog they meet.
Some people never manage to get control of unruly and unreliable dogs.
In all these cases we suggest that the owner seek individual training. We can advise you. You cannot achieve all that in 10 weeks but you can make a start then continue with the methods you have learned. No, nor do we accept in our classes any dog that has been in guard dog or protective training. We train our own puppies from about 8 weeks but they are not mature enough to work in a class until they are at least 6 months old.