My experience has been that clears will usually stink or weep before they explode. I am always a little apprehensive about removing that early unless I am 100% sure I have a nonfertile egg. I don't know what your candling skills are, but I have been tricked by lightly-colored veins more than once, and there are no words to describe how one feels when you crack open a "nonfertile"culled egg and an embryo falls out.
I suppose there could be some residual heat sink effect from leaving the surrounding eggs, but I doubt it would be any measurable effect (depending on your 'bator setup, perhaps).
Should the one egg hatch, will it be a "lonely only"?
Thanks! That's one of the things I worry about. This is my first time, and I don't trust myself. I'm kind of worried that maybe there are chicks in those other two eggs, and I think I'd rather just wait and see.
If it's just the one, it will be a lone chick. I'm thinking I may get some day old chicks, so it can have siblings, and mama has a few more babies to care for. Any thoughts of the pros and cons of just one chick? My flock currently consists of 10 hens, including my broody, and one rooster.