This is how Keilei reacted the first time I put flipflop shoes on her. She kept saying "ouch" and holding her feet. She wouldn't walk in them she just sat there. I felt bad but I knew her feet would get used to them. My feet have to get used them again after a long Utah winter in shoes, socks, and boots. Sure enough the next time she didn't really make a fuss and after that they where just normal shoes.
This is Keilei holding her feet because they where "ouch"