Might want to build a rack for that heating pad.
https://www.backyardchickens.com/articles/pseudo-brooder-heater-plate.67729/
Oh, and...... Welcome to BYC! @j1lly99
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical...
I move mine outside at about one week.
https://www.backyardchickens.com/articles/integrating-new-birds-at-4-weeks-old.72603/
Do you have older birds or are these your first?