Thank you for your patronage! (⁎⁍̴̛ᴗ⁍̴̛⁎) Frozen adult mice, M size, 20g or more, up to around 23g. 100% wood chips are used, and they are replaced daily for hygienic management. Rapid freezing ensures they are delivered fresh, with careful packaging. In addition to well-balanced pellets, we are conscious of providing more natural protein, feeding (grains, fruits, seeds, etc. once a day) and raising them with carefully selected feed. More details are in my profile. They will be a mixed color like the second image. ● If you have any preferred shipping dates and times, please send a message at the time of purchase. As this is a frozen product, you can only specify a delivery date up to 3 days in advance with Yamato Transport. ※ Shipping will be done on the same day or the next day after purchase. You can specify a delivery date within 3 days (from the shipping date). Please consult with us. After shipping, we will provide a tracking number, so you can change the delivery date yourself. ※ If there is no message, we will ship as soon as possible without specifying a date and time. We do not ship to Hokkaido, Okinawa, and remote islands, but if you wish to ship to Hokkaido (+1000 yen) or Okinawa (+500 yen), please comment, and we will check the shipping fee and create a dedicated page for you.