Take a gander at the sausage itself - if it's developed a slimy texture or has visible mold growing on it, it's time to say goodbye. And, trust me, you don't want to be the one responsible for serving moldy sausage at your next BBQ (that's just a recipe for disaster...or a funny story to tell, depending on how you look at it)!
Now, I know what you're thinking, "But what about the smell?" Well, let me tell you, if it smells like a porta-potty at a music festival, it's probably gone bad. A strong, pungent odor is a sure sign that bacteria have taken over, and it's time to toss that sausage in the trash.
How To Tell If Chicken Sausage Is Bad? - (Quick Ways!)
And, don't even get me started on the color - if it's turned a weird greenish-gray hue, it's definitely time to bid adieu. Fresh sausage should be a nice, pinkish color, so if it's looking a little...off, it's best to err on the side of caution.