she has been on them only 4 days they look clear I can only see shadow of the yoke is this how they should be right now? Bella my silkie is sitting on them all the time have not seen her off of them. 2 eggs are white silkie & rooster is buff orpington hope chicks are cute other egg is a buff NN & same rooster.
someone wants to give me some eggs they have to ship em can I put these under my hen?
At four days it would still be difficult to see growth. Even by day seven it will be hard to know for sure unless your eggs are white and your candler is bright. I would not toss those eggs unless they are still completely clear on day 7. By day 7 you should see a very small blob growing inside even if you can't see the veining. Mir they are clear, then they are not fertile. By day 14 you would know for certain because the growth should take up a significant amount of the egg showing a much larger dark blob.
As far as adding new eggs, I would not. Until you are certain the old eggs are not viable, adding more eggs will only cause you problems with staggered hatch and a broody who will stop sitting on the second batch of eggs to take care of the chicks from the first batch. Make sure the first group of eggs are not viable before putting in the second set of eggs.