This morning, using only level 50 and grade 3 pets, after 2 hours and 20 islands, I have only gained 3 Eggs.
While I don't expect an egg from every island I can't help feeling just a little unhappy with the ratio I seem to be getting....however I will plough on in the hope of at least getting enough to buy a hopper from the store.
Since I have only managed to get 44 eggs in 3 days, my hopes of being in the top 50 have vanished.
Edit:
After my post, I had a run of good luck and got enough eggs to buy a hopper from the store....delighted that it was an Easter Pink, which I didn't have.
Continued to explore, with more eggs gained, but now out of islands and cards....perhaps I shall have to thin out my pets:)