Definitely step in and redirect the puppy when they don't respect the older dog's "bug off" signals. Otherwise you run the risk of things escalating, possibly to the point of them needing to be separated 24/7. Made that mistake once, hope to never do it again....
If the older dog has good mat/place skills, then having them stationed while the puppy is leashed for training will work. Otherwise, use baby gates or a pen to keep them apart while you are training them.
If the older dog has good mat/place skills, then having them stationed while the puppy is leashed for training will work. Otherwise, use baby gates or a pen to keep them apart while you are training them.
