lisa you sound just like me my yellow nape and grey get along pretty good for the most i let merlin out and casper. merlin likes to walk around on the floor so does casper anyways they made there way next to each other no blood shed casper seemed curious kind of followed behind merlin.when they were standing face toface merlin backed away alittle and kept saying hello merlin.then eventually casper went and climbed back on his cageso it seems like a good start !