What happens if a dog eats shrimp heads?

Shrimp heads are sharp and may cut the mouth and gut while chewing, causing pain, injury, and infection; large or hard ones can lodge in the throat or gut and block it.

Some dogs are seafood-allergic, showing itch, redness, hair loss, and rapid breathing, even shock or death. Heads have nutrients but also residue; too many cause indigestion with diarrhea, bloating, and poor appetite.