Question to those who sell hatching eggs

[Cawagula]

Just had a quick question to those who sell hatching eggs. I only just recently got into incubating hatching eggs, had a lot of people suggest a local seller. My town prohibits Roos so can't get my own. Orderd a half dozen from this seller last month, she gave 8, only 3 showed development and of them 3 only 1 hatched. There was a temp drop that my incubators thermometer didn't pick up so I assumed this was all error on my part. Since then ordered a better incubator (Maxi Adcanced II) and bought a thermometer/hydrometer to keep in the incubator (govee)

Last week I decided to give it one more shot for the year and ordered another half dozen and she gave me 9. I let them sit pointy end down for 24 hours before incubation, then put in the incubator. One air cell was attached to the side, blood ring by day 4. Two others show no development and are extremely porus eggs. A few seem like the yolks are floating to the top(fat end) like the chalazae are broke.

My question is do you do a quick candling before selling hatching eggs? If so do you discard porus eggs and eggs that look like they won't hatch? I'm not sure if I should contact the seller or if it's just considered part of the risk of incubating. All are opal legbars this time around if that makes any difference.

 

[Cawagula]

Just an update, candled today and only 4 total eggs show fertility. 1 of which already had the blood ring, another is extremely porous but looks to be developing for now, sprayed everything with a hydrogen peroxide mixture and closed up - won't open again till lockdown to candle and remove any rotton eggs. Hoping a few more will show but only expecting 2 to hatch. Debating contacting the seller (local) to let them know, at the very least so they can make sure it's not old birds with a low fertility rate. Praying a few more are there but not showing.

 

[everyday_farmlife]

Down/over here (Australia) we put a test dozen through the incubator to test health and fertility before offering them for sale. Purely so we Know the eggs are not at fault and too cull any hens (from the breeding pen) that don't make the cut (eg. produce small or unhealthy chicks with/without issues) I literally sold a hen last week as a layer (to metro area, where they can't have roosters) because although her chicks were healthy they had a low hatch rate after lockdown and the chicks were too small.
(I ran half a dozen of her eggs through the incubator twice and got the same results.)

 

[Cawagula]

Awesome, thanks for the info. Reached out to the seller and she's gonna get me another dozen from a different hen.