Two bundles of terrier energy
![Smiley :)](https://www.menopausematters.co.uk/forum/Smileys/extended/smiley.gif)
we have a cross Lakeland/westie although he's more westie looking.
Your new one is still a baby so it shouldn't be too difficult to establish the rules as there has been no owner programming before you.
Make sure your boy is seen to first when needing food or putting on a lead for going out or being given a treat. That way he won't feel pushed out and resent the new pup. Be firm with him over who owns what ... Bowls, beds, blankets so he doesn't walk right over her needs.
Play with both of them and encourage their play together with ball, tugger etc.
Have fun. Let's us know how things go.