I'm going though the same thing with my 8 month old female she's on "Fromm's" and her weight keeps going up and down from 64 lbs to 61 lbs, she won't even eat the dry food without the "Science Diet" can food mixed in with the Fromm's dry food, What are your thoughts about Switching the "Science Diet" With "Fromm's" Wet Dog food to mix in the dry food ?Some good tips in here. My boy is 13 months old and has really become picky with his food. We used to feed him dry blue buffalo and mix it with some wet canned food 1-2 times a weeks. Never had a feeding problem doing this since we brought him home at 8 weeks. He slowly stopped eating any of the dry food unless it was mixed. We switched his dry food and he eat it just fine again for a few days. He seemed to love it but now he's back to not eating. He just got weighed yesterday and is 65lbs, he was 75 in December.
I guess I'll have to have him back on the wet food mix and I'll try the cheese on top to. The problem also is we took out his wet food cause it gave him soft stool and he needs a high fiber food because he has anal sack problems. He's gotten multiple sack infections and vet says his stool isn't emptying his sacks when he goes. This dog is driving me crazy!
Update?We have the same. Our GSD is about 9months old now, still intact and just suddenly stopped eating. He will eat a little if we mix his food with some raw alternatives and will eat any treat I give him when we train but doesn't eat other wise. Reading through the posts this seems like a common thing, so we'll try switching foods, adding cheese, etc and I'll post back after a few weeks. We do plan on neutering him @ 1 year old since that was the advice given to us by the vet for optimal growth and joint strength but might have to do it sooner.
Edit: He is also allergic to chicken and we've had him on Hills "Lamb and Rice" for quite some time. From my research and what's available in my country it's one of the best available brands with a chickenless option.