For the past while, my party pets haven't been taking hunger each day, but the rest of my Sylesties have. I've checked the yellow food bar on their profile before feeding my stable, but they're always at 10/10. Is there a reason for this?

Someone has already posted about this a couple of threads below, and this is Krin's reply:

Link: https://www.sylestia.com/forums/?thread=44660&page=1#2 Author: Krinadon Time Posted: 3/19/2017 at 12:47 PM This was actually intentional and is staying. =) I wanted to make managing Parties simpler and one way was to make it so the Site doesn't have to worry about Party Pets running out of Food anymore. The new Party Manager page being released just simply won't let you add Malnourished Pets to your Party. So that way I don't have to code or worry about Pets starving while Players explore. And, to me, it makes sense. The Pets aren't in your Stables if they're out exploring and I assume that while exploring, you will keep them Fed quite easily. Thank you though for letting me know!

Ah. That makes sense. Thanks!