My achievement shows 0/7 as of today. I completed the quest chain and obtained the pet and mount when the content was current. Because I already completed it, the option to feed bumbles 7 times is not available since you can only do this once per account making this achievement not possible to obtain. The toon I originally did it on was a human warrior. that toon is now a orc (assuming this is where the bug happened.) I should already have credit for this achievement.