Sick as dog and Sick as a dog

Sick as a dog and sick as dog are semantically related. in sick topic. In some cases you can use "Sick as a dog" instead an adjective phrase "Sick as dog", when it comes to topics like not feeling well, not healthy, not comfortable.

Sick as dog and sick as a dog are semantically related. You can use "Sick as dog" instead an adjective phrase "Sick as a dog".