Not a good approach to force fetch!
If she continues her bad habits ie. mouthing birds, repeatedly dropping birds. The habits will be twice as hard to break if she is older!
Best to buck up and get the force fetch over with.
Just my opinion.
BT
Eight months is the perfect age.
Just sounds like your obedience isn't very good. Work more on obedience with the pup.
FF will clean up all those issues you are having. Just like what the other poster posted.....once you start force fetching......finish it complete. No piss assing around...