When...
... you realize that you no longer photograph your child unless he or she is "in the way" of a chicken shot.
...you analyze everything you see for possible chicken related usage. 
...you begin trying to conceal the actual number of birds on the premises from your significant other and/or family. Eggs in 'bator are never in the equation presented.
..upon a click of your internet browser, BYC is the first thing to come up.
...you haven't missed a single day posting on this forum since you joined.
...daydreaming is centered around maximizing your property for more birds.
...a forensics lab would find traces of chicken (poo or feathers) on all your shoes and clothing. You realize that if you kill someone, it will be traced back to you via your chickens.
...you spend more time whipping up tasty yet nutritious treats for the birds than you do your (two - legged) family.