I am on a lot of pet sites, actually.
Flight Rising, Dragon Cave, Mysgardia, Pet Adoptables, Tales of Ostlea, PokeFarm Q, PokeHeroes, Egg Cave, Forest of Mirrors, Eldemore, Sylestia, Click Critters, Mistic Pets, Felis Fire, Chicken Smoothie, GPXPlus, Xanje and Aywas....
There was a site, a few years back called "Dragon Adopters" and it originally started as a college project and for a while it really grew but the owner decided, after a certain point, to retire the game.
It was really sad because I really liked the game too.
Then there was another called "SilvWolf" and "Tale of Dragons" which was owned by the same person but due to health and financial issues that site was discontinued as well.
Ah..then there was one called "Catisserie" or something where you could collect kitties (I like kitties) but once again, due to the owners growing health issues, that site was closed.
Why is it that all the sites I like get shut down after a couple of years or less? (sniffs)
Edited to add: Oops, almost forgot, I am also on Leayph and Virtuadopt too