This time I'm doing both. I candle to see blood vessels, and later I use a stethoscope to check for a heart beat when they are dark. That way you can toss the truly dead ones and don't have to worry about exploding eggs. Today is week 2 on my eggs and I had fun listening to their heart beats.
I've found a cheap stethoscope on ebay, I've bought it through "buy it now", and had it 3 days later. This one is brand new and excellent. Best is was under 4 dollars without shipping. I've paid 7 dollars including shipping. Can't beat that and their service was great. So here is the link for the stethoscope I've purchased. Check out their other ones, because they do come in various colors. This one is actually a descent one, even if it is cheap. I think it will last for years.
Katharina
I've found a cheap stethoscope on ebay, I've bought it through "buy it now", and had it 3 days later. This one is brand new and excellent. Best is was under 4 dollars without shipping. I've paid 7 dollars including shipping. Can't beat that and their service was great. So here is the link for the stethoscope I've purchased. Check out their other ones, because they do come in various colors. This one is actually a descent one, even if it is cheap. I think it will last for years.
Katharina