Well...when my cats kill a mouse, bird or rabbit, I never find any evidence of blood so I"m assuming they eat that and these creatures like to have dinner on my porch so I would notice. Luckily, my dogs have not killed anything so I don't know what they do with the blood.
I wasn't in any meeting for Victor dog food so I can't speak for what was said but IMO, if the nutrition and quality is still there so my dogs still do well on it, and they are trying to keep their prices in a range where normal people can still purchase their product rather than a huge jump in price, more power to them.
And just an FYI...some formulas had such small changes that it should make zero difference in the quality. Beef and rice - one grain was added in front of the pork meal. Protein content went up 1%. That is to small to even notice. Previously 68% protein from meat, now 77%.
Nutro Pro contained blood meal prior to the change. I just took a picture of the bag I have. It was the 4th ingredient, now it's the second. Previously it was 10% protein from grains and veges. Now it's 8% from grains and proteins. Same ingredients, different order.