You could tell you have read so much on YT about breeding and you have been worrying about Daisy ever since she told about her plans to breed her.
Print her some information and invite her to join. I would express myself in a way that shows you are concerned and care for her Yorkie and maybe she won't feel like she is being attacked. Usually, we can make much more of an impact when we approach people in a non-threatening way. Hopefully, she will see your concern for Daisy and appreciate it...hopefully.
