Question: what do dead dog fleas look like?
Answer: Fleas don't turn color when they die. If they're reddish brown to begin with, they're likely reddish brown when dead. If you are looking how to distinguish dead fleas from flea feces, the fleas will be bigger (about 1/16” to 1/8” long; about the size of a small grain of rice). Flea dirt is more like tiny specks.