i have found that searching for traits gives too many pets that are like this. they are popular pets and have already been hatched with in that hour. (i think its an hour). this doesnt happen to me when i just search through a pet type, so i am guessing they are "removed" for an hour doing that but are not "removed" when you do a search by trait. they do come back though.
Why does this error occur in the hatchmaking kiosk? I'm trying to hatch with a very specific type of pet ( Shiverous Knight w/ spell proof, ice dealer, pain giver, spell defying and ice giver) but all of them are unavailable
That message means that the pet you are looking for is still in the Kiosk but you cannot hatch with it because it already has 10 hatches. Once a 10 the owner needs to remove the pet and put them back in before you can use that pet to hatch with.
I'm not sure why maxed out pets even show up but it should come as no surprise that the better pets get hatched more.