The blonde beauty, who is married to Josh McKee, also uploaded a new photo of the little guy on Instagram.
“We have another week or two plus in the NICU and I'm starting to have some mental breakdowns — being away from my other two [four-year-old son, Gannon, and two-year-old daughter, Jaxie] and just simply wanting to be at home with my family in one, but I'm doing my best,” Mackenzie wrote.
“I can't thank God enough for my husband through this time, who has went above and beyond for me and Broncs. I don't know what I would have done being alone in this time.”
The newborn was placed in the NICU for a variety of health complications, including a blood infection and crowded lungs.
Mackenzie once again thanked fans for their love and support during this time.