I used to play this game a lot but now it is starting to get slow and boring. My stables are always full and it is hard to rack up enough money to buy more. Also, nowadays posting on the auction and pet sales thread won't get many people to buy your pets. There should be an AI run marketplace where you could buy eggs or grown pets for gold and sell your eggs/pets for gold to make breeding pets actually worth it.

I believe I've heard that they were planning to make a shop like this.

and pet auctions forum is hell

By the way, you can buy puffadore eggs for gold in here and nyvene eggs here.