Concerned about raccoons & skunks.
Will Using Milk and or Molasses Attract Rodents
Certified GKH Gardening Expert
These articles have additional info and may help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/milk-fertilizer.htm
Yes, such things will attract all sorts of critters. Why do you want to use milk and molasses? For fertilizer or something? There are so many other things you can use that are organic, why create problems for yourself. I don't think food substances that can rot are a good idea to use on plants.
Here's an article on organic fertilizer: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/types-of-organic-fertilizer.htm