You are doing a good thing for her, keep repeating this to yourself. I have been wrestling with the neutering thing as well. Every time I convince myself to do it, my fiancee pipes in and says its cruel and to leave Nikko's "nuts" alone.

I guess its a guy thing

Nikko also has retained baby teeth that need to come out. I may just do it despite what anyone says but I worry as well. In the end, you are doing the best thing for your baby and I am sure she will be back to her old playful and loveable self in no time. I will keep you and your little one in my thoughts and prayers.