Organic fertilizers are often made with animal and plant products and smell rather strong. More is not better, follow the application rates and directions on the package or box. Some examples are:
Manure is a natural product but if the animals do not eat organic feed and are given antibiotics then their manure may not be organic. Be very careful when applying manure, make sure it is well rotted. Raw manure is 'hot" can burn plants. All manures should be used sparingly. Steer and horse manure can contain a lot of salts and can also burn plants so apply wisely.
Here is a short list of prohibited products: