Is this egg fertile?

[chickeneer45]

Currently, I have an all silkie flock. The majority of the flock are either hens or chicks but I do have two almost-6 month old mystery chickens that could be roosters or hens. I thought this is way too young for either of them (if they are roosters) to fertilize eggs, but I cracked one today and was surprised to see a relatively large white dot... I have no known roosters in my flock so these two mystery birds are the only potential roosters so far. Here is a pic of the egg, please let me know what you think... Thanks1

 

[BorneHomestead]

It is really kind of hard to see as the images are blurry, to tell if you have fertile eggs you will be looking for a bullseye, like the one here in the picture, as for the 2 you suspect as roosters you can take pics of them and post them on here and we can help you determine if they are or not.

 

[Peplers chicks]

Currently, I have an all silkie flock. The majority of the flock are either hens or chicks but I do have two almost-6 month old mystery chickens that could be roosters or hens. I thought this is way too young for either of them (if they are roosters) to fertilize eggs, but I cracked one today and was surprised to see a relatively large white dot... I have no known roosters in my flock so these two mystery birds are the only potential roosters so far. Here is a pic of the egg, please let me know what you think... Thanks1

Jip they are fertile,