Not to put to fine a point on it, but it seems squab is a stage of life. So, I'm thinking any pigeon in this pre-flight stage is eligible to be "squab" in the consumption arena. Basically, I stand somewhat corrected; I think; maybe; not sure.

Is there enough fat in the meat? I know that you can't live off rabbits for an extended time due to it being too lean, I wonder about pidgeon.

A one-pound squab (1 serving):

Calories: 873
Total Fat: 71g
Saturated Fat: 25g
Cholesterol: 282mg
Sodium: 160mg
Protein: 55g
Vitamin A, Vitamin E, Calcium and Iron

It's high in fat and cholesterol, but the info above includes the skin, where I suspect most of that is. Cook it in the skin to keep it moist, then discard the skin before eating.

Depending on the breed, some can get to be 3.5 lbs live weight.

Sue

It does seem to appear that commercially raised squab is a young bird when they kill it.
Bill