I am aware that this is seperation anxiety, my female did this for a while too. I need some advice on if this will still go on for a while, and to know if purchasing a cage might be a good alternative( if yes I would also like to have suggestion on the recommended size for a 3 month old lab. Thank all very much!
This isn't SA. This is typical behavior from a puppy (or untrained dog) who has the run of the house and no one supervising.
A crate is a good idea.