I have no idea about the first part of the question. The second part, I'm a little more familiar with. I had to seperate my dogs when they got fixed. Not all day, just when they got hyper. Both of my dogs felt perfectly normal by the next day so it was dificult for me to keep them under control. Heidi had to be on some sedatives because she was really bouncing off the walls! They heal really fast though. It's only hard for the first day or two. I think I had both of my dogs done on Fridays so that I could be home all weekend to supervise them. I wish people could bounce back as quickly as dogs after surgeries....they're amazing!