Original flock attacking new layers eggs

[Alycat23]

I've got 7 ISA browns in my original flock & 2 that have integrated and just started laying. On more than 1 occasion now, the originals have attacked the eggs of the 2 new layers. Is this normal? Do they perhaps detect something wrong with the eggs? The new eggs are significantly lighter in color and smaller, which I think I remember being the case when the originals starting laying. Interested to hear about this.

 

[aart]

How long have the new birds been integrated....and laying?
Id toss some white fake egg in the nests, and gather real eggs frequently.