Hi and welcome to HC! Congrats for giving Yui a loving home with you. I love his name. I'm glad that he did well with being held at the store. As Amethyst_ice said, everything is still new so he may just need a little extra time to settle in. As long as you notice that he is eating and drinking, he should be fine. Have fun with your little one. I look forward to getting to know him when he is all settled in.