What you need to do is determine if, indeed, chickens are raised on hormonal feeds in your country.
Where I live, they are not. (Not the case with beef, though.)
It is true that very young chickens here are fed grain compounds which contain antibiotics to protect the chicks from infections. However, this is short term only, and by market time the chickens have no traces of antibiotics in their flesh.
There is a bird, prized by some groumet cooks and chefs, called a “capon.” This is a male chicken which is castrated early in its life in order that it will grow into a larger meat product, and more tender than a rooster would normally be. Because they require a longer period of time to reach market stage, they are more expensive. However, there is no need to raise them on hormonal feeds because the alterations in their own chemistries, through castration, provide for the additional body growth.
Cajun’s suggestion of possum is a good one. They are never exposed to hormonal feeds. Where he lives - a very decadent and rural southern place - possums are gathered in the form of “road kill.” I have a very fine possum recipe, if any of y’all should want it.