Heating coops is just asking for a less hardy bird, IMO it is a serious mistake... any breed can tolerate the climate it ends up living in as long as they have plenty of space in the coop, it is draft free and well ventilated... fertile eggs can withstand cold much better than too much heat... but there's also no guarantee that winter eggs will even be fertile... many cockbirds lose interest in mating in cold weather, and if they do a lot of times their contribution isn't even viable...
Also, forcing year round laying of any rare or heritage breed is not good for them at all... they aren't meant to lay like that... if you want year round layers, invest in hybrid high production layers every 18 months and you will always have eggs...
As for Ayam Cemani's having 'many problems', that's just misinterpretation... ANY breed, especially rare or heritage, will need to be bred properly, culled properly and responsibly managed to produce quality... not one will always be perfect from each hatch, sometimes there won't be any at all, or maybe a single one, but that is in any breed... laced breeds like you have listed are extremely difficult to breed correct lacing and takes years to produce consistently... then there is the possibility of diseases, injuries, predation, and many other little things that can crop up unexpectedly causing setbacks and more investment of time, work and money to correct...
If you are set on being able to make some money off of birds and in a quick timeframe, I suggest getting a RIR cockbird and a flock of RIW hens and making sexlinked chicks you can sell off as layers and pan frys...
Getting into a rare breed is about the love of the breed and wanting to improve the breed for its own betterment, not for profit... it's just not going to happen and is setting yourself up for much disappointment...
Also, forcing year round laying of any rare or heritage breed is not good for them at all... they aren't meant to lay like that... if you want year round layers, invest in hybrid high production layers every 18 months and you will always have eggs...
As for Ayam Cemani's having 'many problems', that's just misinterpretation... ANY breed, especially rare or heritage, will need to be bred properly, culled properly and responsibly managed to produce quality... not one will always be perfect from each hatch, sometimes there won't be any at all, or maybe a single one, but that is in any breed... laced breeds like you have listed are extremely difficult to breed correct lacing and takes years to produce consistently... then there is the possibility of diseases, injuries, predation, and many other little things that can crop up unexpectedly causing setbacks and more investment of time, work and money to correct...
If you are set on being able to make some money off of birds and in a quick timeframe, I suggest getting a RIR cockbird and a flock of RIW hens and making sexlinked chicks you can sell off as layers and pan frys...
Getting into a rare breed is about the love of the breed and wanting to improve the breed for its own betterment, not for profit... it's just not going to happen and is setting yourself up for much disappointment...
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