In the past few days I read on here about someone putting multiple MHP's in their brooder.
I have so busy I could not really reply when I read it. I recently did that. It did not work as planned.
I had 2 large groups of chicks 50-60 and knew they would not fit under one pad. I set up two, one at each end of the brooder. My thought was these little fellows would find a fair and democratic way to split into two groups, one under each pad.
The birds failed democracy 101. The all huddled under the same pad. They could not get under it. I even used a little night light near each one to draw them apart.
In the morning I had little birds that could not get under the pad all around it. They were fine, the other pad was empty, not one bird around. During the day they had used them both running under and getting warm then out to eat and play. Not at night.
When I lifted the pad I had 2 that had died, squished together I am sure.
So if you need to use two pads, and I hope you don't, keep them together to spread the birds out. I will not use two again, I will split the chicks into separate brooders even if I have to use the bathtub as a brooder....
Maybe your chicks will be smarter than mine, but that was my 2 pad experience.