Spray slow cooker with nonstick cooking spray.
Layer half of the frozen tater tots on the bottom of the slow cooker.
Sprinkle with 1/3 of the bacon pieces.
Now top with 1/3 of the shredded cheese.
Add diced chicken on top. Season with salt, pepper, and chicken seasoning. Now add 1/3 of the bacon pieces and another 1/3 of shredded cheese.
Put the rest of the frozen tater tots on top.
Finish with the remaining 1/3 cheddar cheese and remaining 1/3 of bacon pieces.
Pour 3/4 cup milk all over the top.
Cover and cook on low about 4-6 hours. (If your crockpot is newer, really watch around the 4 hour mark)