Maybe. I know intra-muscular triglycerides (IMTG), which is fat streaks in muscles, are generally the result of obesity and insulin resistance in humans. Athletes also paradoxically have these but for a different reason. I don't know how similiar pigs are to humans, but it is possible that the streaks are from insulin resistance. Unless they are athletic pigs.
I've been using back bacon but, being that it has more protein than fat, I was going to switch once I run out of the back bacon that I've got. I'm guessing it's closer to 1:1.