Please help my Maple tree! (photos attached)

[YardworkVa]

I have a 3 year old Maple tree that has starting losing bark over the past year. Cannot someone please tell me what is going on with my maple and if I should be concerned about planting new trees ?

 

[Raintree]

Looks like some mammal has chewed off the bark.

This is what Porcupine damage looks like.