I got the Ji-Kun Hatchling in LFR this past week. It appeared in a loot popup window. I got a 'failbag' from the boss as well, which only contained gold. The Ji-Kun Hatchling went to my bags, just like normal loot would.

Traditionally, if the game keeps track of things like kills or number of items owned, your achievements will be awarded retroactively.

I enjoy fishing, and I enjoy archeology. I don't enjoy PVP, and I don't have the time to commit to a normal-mode raidgroup. I'm enjoying fishing for the carp a few minutes each day, as a I fish for the Nat Pagle rep fish. If you spend three or four hours a day fishing you'll be as grumpy as someone ...

Enchanted Broom is fantastic. I strongly recommend you give it a try.