First of all ... ((((HUGS)))) Bobbi! Do you think that Lydia is just wanting to play with Briggs, or do you feel it is a territorial type of thing? Depending on your answer, my suggestions would be a bit different. Lydia may be trying to set a pecking order with Briggs, but I agree that you don't need or want Briggs to be terrorized or traumatized in her own home! I have a feeling that Lydia is trying to just play, and she is very frustrated that Briggs isn't interested in being her friend!

Maybe go back to the crate thing I had suggested once before .... Lydia in "lock-up" in the center of the room, with Briggs as the dominant one, circling and sniffing. Maybe in time, Lydia will realize that Briggs is upper rank and will settle down a bit. When you let Lydia out for playtime, just do so in another room. I hope this helps some, I know it is upsetting and frustrating ... but I really do feel that in time things will work out.

Kim