We feed many, many squirrels daily. They get a variety of nuts and peanuts. I also wondered about a calcium imbalance by giving all the nuts. I decided to make up boo balls and my husband gives them out before any nuts are given in the afternoon when everyone shows up for food. I grind up Harlan Teklad block and mix it with veggie/fruit baby food, powdered Fox Valley Formula and Ultraboost, ground nuts and avocado or coconut oil to hold it all together. Then we roll them in balls and store them in the fridge. We’ve been doing this for years and it seems to be working….they're eating them and I feel less guilty for giving so many nuts.