Please help. Are my eggs even fertile? - diy candling day 6-7

[NarrawalleeChickens]

When a hen has just a couple eggs under her to brood they frequently get crushed under the hen when they start to hatch. I'd advise that you put four dummy eggs with the 2 iso brown eggs. If you don't have anything to use as dummy eggs four store bought/infertile eggs will work. Do not use the infertile eggs from under the hen as they will spoil sooner.

Great advice, thanks @nchls school
I have some dummy eggs, should i put them under her now or wait till closer to hatch, like day 17 or something?

 

[nchls school]

Now would be better. Making unnecessary changes close to hatch time isn't good.