I have a 20 lb schnauzer who can easily get a little rough with my 3 lb Epsilon. If things look like they are beginning to get out of control I tell her to "be nice" and she calms down. We also do this thing with her where we put her on her back while they are playing and say "let Epsilon win!" and she'll stay on her back and play that way so she's much more gentle. It's actually pretty cute
