NorthernMN

You had better chack your laws in your state. In Minnesota a mineral block isn't considered food. So you can hunt by them.

Bait
• No person may place or use bait for the purpose of taking deer.
“Bait” is defined as grain, fruit, vegetables, nuts, hay, or other food
transported and placed for the purpose of attracting or enticing
deer. This restriction does not apply to foods resulting from normal
or accepted farming, forest management, wildlife management,
orchard management, or similar land management activities.
• Liquid scents, salt, and minerals are not considered bait.