Largest gland in the body of fowl is

The largest gland in the body of fowl is Liver.
In avian species, the liver is larger than in mammals when compared to body size. The size and colour of the liver depend on age and body weight.
The avian liver has much less connective tissue than the mammalian liver and it lacks a true lobular structure.
The liver is a large organ in the abdomen that performs many important bodily functions, including blood filtering. It is also considered a gland because it makes chemicals the body needs.