Is that 80 to 85 just for lockdown?
Also, have you checked to make sure that your thermometer is correct? Day 25 is early for the others to be hatching, so I'm thinking that your temp is actually running a bit high. Or is it possible the others had already started developing when you put them into the incubator? Perhaps they had been outside and the temps had been high, or a duck may have been sitting on them?
One other question, is there any other breed of duck that you have that these might be instead of pekins?
Also, have you checked to make sure that your thermometer is correct? Day 25 is early for the others to be hatching, so I'm thinking that your temp is actually running a bit high. Or is it possible the others had already started developing when you put them into the incubator? Perhaps they had been outside and the temps had been high, or a duck may have been sitting on them?
One other question, is there any other breed of duck that you have that these might be instead of pekins?