RE: Brit won't use her nose
Have you tried putting birds out and let your dog go (no check cord) and see what it does?
The reason I ask is I was having a problem kinda like yours w/ my dog. I had him on the CC and would lead him to the bird and it seemed like he couldnt smell. but I got w/ a trainer and he said unhook the CC once and see what happends and he went flying around finding/flushing/chasing all the birds. so the problem was not the nose it was for some reason or other he was shutting down on the CC.
another thing is at this time of year depending on the heat and a no breeze its a little harder for them to pick up scent and even more so for an unexperienceddog.
I am not a trainer so take that w/ a grain of salt. and I also agree w/ what Dale said.
oh you said about taking him to a trainer. well that might be the best option.
good luck and keep us posted
I should add that my dog was a champ at sight pointing. but would not point on scent. a bunch of hard flying birds and releases was the trick