One of my interested theme is relationship between pet and people. I went to pet store hope to find out what interaction make pet feel good when spend time with people. I find toys are interactive and companion. Interactive toys are mainly balls and frisbees. The companion toys are mainly plush toys, which may be an inspiration for me to do the theme of easing separation anxiety. And pet like the toys which make noise, This probably from the hunting habits of their ancestors. So I will do more on toy for my puppy, from his perspective.