Look at the charming qualities of all your pets and choose one of the high charmers.  I forget the name of the one I used but it was one of the donkey type ones, and added the charming collars.  Also the very last of the evasive critters do sometimes take a while to show up, after you've charmed maybe five to 10 other animals so you have to keep charming the ones you don't need eggs from.  It requires patience so don't play if you're tired.  Good luck.  I hope you get them soon. :-)

I agree, it is a tough game, but I did enjoy playing it.  Although I will say it takes some practice to master doing all the restaurant duties and also making match 3's at the bottom of the screen, which becomes vital to passing some levels later in the game.   The important ones are the coins for money bonuses and the cleaning brushes that will clean the stations once you match 3 of them.  This saves time from you having to clean the stations and you can serve customers faster this way.  There were a few levels that are a doozy to pass.  Have fun and enjoy the game!! Pinky