While I prefer using empty rice bowls for a care miss, if you don't have enough time left in this growth stage you can empty the friendship bar much faster.
When they wake up dirty because you didn't bathe them yesterday, their friendship bar empties a little bit. You can empty the friendship bar by repeatedly setting the time to 6:59 AM, then waiting one minute for them to wake up. Once the friendship bar reaches empty, they'll call for attention. For the next 15 minutes, don't do anything that could fill up some of their friendship bar (i.e. don't play games, don't connect with another Tamagotchi, don't use any toys, don't go shopping, etc.) After those 15 minutes, the attention icon will turn off by itself. That's a care miss. Note: when the attention icon turns off, your Tamagotchi character might get sick. Administer first aid as required.