10 oz of muscle meat
2 oz organ meat
3 oz grain
How much does your dog weigh? How active? You can't always go by what a chart says, you have to take into consideration your dogs activity level and metabolism. Gunnar is 85lbs. 2-3% of his weight is 2-2.5lbs of food. If I fed him that he'd waste away. I know, he was there for a while- too much ribs and hip bones. I had to bump him up to 3lbs of food per day which is more like 3.5%, and he put the weight back in in a couple weeks.
No bones? How is your dog getting any calcium without bones?
Thats as much organ meat as my 85lb and 70lb dogs get. Too much in my opinion. Bruzer, who is about 25lbs, gets maybe 1 oz and not every day, more like 3 times a week.
How about fish? That can be a good source to rotate in. At least supplement with some fish oil if nothing else.
Remember that most dogs are going to react to a new food source, so what happened with pork may be OK, and if you stuck with it it'd work out in a couple days. I try not to feed too much of the fatty parts though. Have you fed eggs at all?
I'm not sure how Shelties shed, but Gunnar will blow out his coat 2 times a year, where he sheds real heavy for a period of time. After that he sheds some but not anywhere close to what I've seen from some of the other "German Shedders" at OB class, who when you pet them the hair is flying off. So maybe he's going thru a shedding period right now.
Good luck!