https://vanillawowdb.com/?quest=2750 A Bad Egg, https://vanillawowdb.com/?quest=2749 An Ordinary Egg, https://vanillawowdb.com/?quest=2748 A Fine Egg and https://vanillawowdb.com/?quest=2747 An Extraordinary Egg are the four egg-related quests offered by Curgle Cranklehop.

To get the eggs, proceed to Feralas to the location of the https://vanillawowdb.com/?object=141931 Hippogryph eggs and collect one, then return it to Curgle.

Thank you to Alincoln for the egg location reference.

I got my first egg in Feralas at 58.4/76.4 & also noted you could find them scattered along the craggy cliff walls near the ogres Ruins. I also noted specifically at 56.6/75.9. They are up high, above the grassy area that's chock full of hippogryphs that are all in the 43-45 level range. I also came upon the rare spawn hippogryph that's a level 48 (not an elite, just rare.)

If you have a way of summoning a vendor (mammoth, squire, scrapbot) you can vendor an egg, get another, vendor it and continue until you fill your buy back tab (10 or 12, can't remember which right now) grab one more and head to Gadgetzan to turn in. You then buy back an egg, turn it in and repeat until they are all gone.

This makes the process faster as far as rep goes, but still painfully slow. The only reason I really see is the chance at the rare recipes that can apparently drop from the Box of Goodies you get for an extraordinary egg. I personally received a Recipe: Elixir of Dream Vision from the box. Wowhead only shows info for 343 openings of the Box of Goodies, so I'm assuming the Extraordinary Eggs are rare.