Hi , i just thought i'd pass this discovery on to anyone who may be interested. Dollar General stores have been selling something called a "Ear Amplifier" for 5.00 It is just a cheap "hearing aid" gadget but it works perfect to find out if your eggs are good once the chick has developed enough to hear a heart beat...Just hold the egg up to your ear while using this and if it's good , you can hear the chick inside. I use it with my coturnix eggs as they're impossible to candle and i don't feel safe float testing them.Takes about 2-3 seconds to test....
can't go wrong for 5.00 !
