It might not be noticeably spoiled, but it would not be safe to eat.
If the corn dogs were left out on the kitchen counter overnight, most likely the meat would contain harmful bacteria and they should be tossed out. If they were left overnight to defrost in the refrigerator, they would still be safe to eat.
Don't use it. Throw it away. It might not appear spoiled in the traditional sense (moldy, bad odor, slimy), but bacteria could have grown and toxins could have formed that could make someone sick.
No food safety person would recommend that lasagna would be safe to eat after it was left out overnight. Throw it out. I would not recommend eating anything left out overnight that contains ANY form of dairy (this includes the ricotta cheese in the lasagna), meat, eggs, or anything that contains a single ingredient that should be stored in the refrigerator.
No. Shrimp that has been left out overnight is not OK to eat.
Unless the packaging says it doesn't need refrigeration, leaving the half-and-half out overnight isn't a good idea. It might not appear spoiled, but bacteria would have increased in population and it will show actual spoilage much sooner than if it had remained refrigerated.
no
They may be unsafe to eat if left out overnight and should be thrown out.
does squash spoil if left overnight or two days
they can get really hard if left out of a bag
No. It is not safe to eat turkey left out overnight in any container.
No, it may not be safe to eat after being left out overnight.
No. Stew left out overnight would not be safe to eat, covered or not - unless where it was left out was as cold as a refrigerator.