If you're talking about the typical "raw" oats like Quaker Old Fashioned, they aren't actually raw. They are extensively processed by the tim you get them, and are completely safe to blend with whey powder, I have been doing it for years. I've also been throwing in a raw egg or two for years; there is some small risk, but I just buy high-quality eggs and keep them fresh.
You can even take the oats and grind them in a coffee grinder, and measure the powder out into pre-measured one-cup or half-cup baggies for travel or work. You can throw a half-cup of oat powder and two scoops of whey into a 12-oz Styrofoam cup and quickly mix it with a coffee stirrer. Very convenient.
The oats that are really raw are impossible to blend or chew.