Gudetama - What does burp mean????

[Evieeee]

So I recently got a gudetama tamagotchi.I understand everything except when I feed him and I press c after to see if it wants anything else is simply says “burp burp”.I'm not sure what this means and would appreciate if someone would help and tell me why and how to care for this.thanks

 

[Jhud]

That just means they're burping.  I don't think it means anything, probably just that they're well fed.