I have a 5 yr old boxer who I got as a puppy. She has never liked doors that aren’t almost fully open or open all the way. She will stand and stare at it and wait for me to open it all the way before she will go through it. The only 2 exceptions to this is if she is on leash or at the back door where she can go outside/inside to/from the back yard…or if one of her puppy friends is on the other side of any door, then she just barrels through them, haha.
Boxers are funny things, so brave yet little chickens at times…but what love they share with their humans!