Now for the issue of heat. You aren't heating the brooder. You only need a single heat source for the chicks to replenish body heat. They need the majority of the brooder to be cool so they can regulate their body temperatures by shedding excess heat as well as warming themselves. They are just like lizards at this age. Improper heating contributes to pasty butt and constipation.
You only need a heat footprint under the heat source at around 80F at eleven days. The entire brooder should not be 80F. If you take away the light, the heating pad will probably be sufficient. I would create more of a height gradient, lower at one end, higher at the other, so the chicks can touch the pad with their backs if they feel chilled. Direct contact is how the heating pad system works.
Using only the heating pad "hut" will allow the rest of the brooder to be cool, allowing the chicks to feather out more efficiently and to wean themselves off heat in a more natural manner. By 21 days, they should no longer require heat during the day. By five weeks, they should be finished with needing heat, even at night.
You only need a heat footprint under the heat source at around 80F at eleven days. The entire brooder should not be 80F. If you take away the light, the heating pad will probably be sufficient. I would create more of a height gradient, lower at one end, higher at the other, so the chicks can touch the pad with their backs if they feel chilled. Direct contact is how the heating pad system works.
Using only the heating pad "hut" will allow the rest of the brooder to be cool, allowing the chicks to feather out more efficiently and to wean themselves off heat in a more natural manner. By 21 days, they should no longer require heat during the day. By five weeks, they should be finished with needing heat, even at night.