
You have two puppies! Your staff is very young, and dalmatians start to mature mentally at about 8 years old (I know, I have four of them at the moment, and it seems as though something suddenly 'clicks' at that age.). I would suggest you do lots of walks and training with the dal - he's old enough now to be built up to a few miles - and then some one-to-one with the staff - plenty of short training sessions and short walks, again, without the other dog.
Good luck.
:)