I have found that feeding my dogs a food high in fish has improved their allergies. This was plainly ethical, right?

I was suggesting that people test on themselves. Which is we something we already don and can only avoid by outsourcing all our choices. If I expect a given behavior to be net-beneficial and I carefully document and publish my findings who is harmed?

What set of behavior, specifically, are you looking to legislate away? The fewer people looking for drugs and treatments the more expensive those will be. Every restriction is another price hike.