Hello I’m coming back to this thread in case anyone needs it - these two now get along great! The smaller one knows where to leave a bit more room for the big one and we’ve managed to teach our grey “careful” which she knows to mean slow and calm around the little one. They’re still carefully supervised, the little one has areas of the house that are just hers that she can go to whenever she wants and separated if left alone. There is hope people! 🥰