Hello Adrian. When you open a package of raw chicken and encounter a strong smell, it is often due to the modified atmosphere packaging used to keep the meat fresh during transport, which can trap harmless gases. However, a sharp, sour, or sulfur-like odor can also indicate initial spoilage or bacterial growth.
If the chicken has a slimy texture or an overwhelmingly foul, sulfurous smell that does not dissipate after a few minutes of airing out, it is unsafe to consume and should be discarded. Always rely on a combination of smell, touch, and the expiration date to ensure family safety.