Raw meat should not have a smell to it. When it has an odour to it it is a sure sign that it is starting to spoil. Blood will spoil quicker and some rare conditions causes the smell on the meat. Washing it off helps to reduce the odour but it is best to just toss it out to avoid being made sick by eating it.
Salmonella enterica infected chickens will release hydrogen sulfide gas, which smells like eggs. It is found largely in chicken products and eggs. It is killed by cooking at high temperature, but it is best to avoid using it if the chicken starts to smell like that. Salmonella is the second most common bacterial cause of enterocolitis.