"Oh no! None of your pets are eligible for battle. You might want to make sure that they're well fed and happy!"

I keep getting this message, even though I have at least two of my pets both fed and happy. :l I cleared my cache, nothing. I fed another pet manually, not with the resort like i did with my other pets, and now she shows up as eligible for battle, but neither of the other ones that are clearly fed (through being put in the resort) did. What do?

Is it in a battle already? Are they in battle? http://subeta.net/games/battle/stats.php if the pets you're looking for are already in a battle they cannot be put into a different battle

No, not currently in a battle. :c

Do they have full health or 0?

If you only recently put them in, they may not be fed yet. The resort does not immediately feed your pets. It does so on a timed basis determined by the package you bought. Check again.

Also check, as suggested, your pets' health.

ah, there we go. i didn't realize that those pets were so low on health! thanks owo