Is there any kind of detrimental effect if you don't feed your pets? I've been feeding mine because I feel kinda bad for them, but maybe I am doing too much lol. Or maybe there's a benefit to feeding them?

You cannot breed your pets if they are completely starved or send them on missions. Most people only feed their stable where they keep mission pets or their main party. While I like to keep mine fed most of the time, it does eat up a lot of gold if you have a lot of stables. They also do not recover health and will fall unconscious if unfed for too long, but you can bring them back.

Ahh I see, well then I better keep mine fed because my breeding pets are all over the place... Thank you!

You can feed individual stables when you click on "Feed Pets" you have the option to feed "Current Stable" or "All Stables" so you can move all your project pets to one stable and just feed that one. = )

You can also feed individual pets on their profile pages, though that might be a hassle to do if there's a lot of them.

Just wanted to mention that you can breed your own pets even if they haven't been fed. The only thing I've found I can't do is send them on missions.

I use to feed all of my pets, but that has become cost prohibitive. Every month? (Not sure on the timing) I get the free revive all that I always do.