Im sure darby was younger when i had this problem.
just stick with it, possibly reduce the meat and increase the kibble for a while or leave out the meat altogether until she gets the message.
I know it can be a struggle but berners really do know how to play us!... after the 1st stand off with my guy he just laid down on the floor one night and wouldn't move - of course it freaked me out so i ran down and got 5big macks and gave him the meat from them - no doubt he suddenly 'recovered' with a look of contempt on his face
after that i knew he was completely playing me!! now if he doesn't eat the kibble i simple remove it and make sure he can see me eat something tasty when he has no food. come the next feeding he eats all the kibble again! he rarely skips a meal now. i hope this helps