silkie not covering all of her eggs

[tracy 5447]

hi,
i have a broody hen and yesterday bought her some hatching eggs. i went to check on her this morning and she was only on 5 of the 6 of them. i put it back under her but should i get an incubator as a back up?
this is my first experience with hatching eggs and wonder if 6 is too many. we went to the mart to get silkie eggs as they are small but there was a mix up with the sale and someone else got our eggs and we ended up with Salmtaler bantams. they are still pretty small so thought she would be ok.
any advice would be appriciated

 

[tracy 5447]

just to add, she is a Silkie

 

[sumi]

Only let her sit on as many eggs as she can cover comfortably, in this case it sounds like 5 if the right number.