Hang irish spring cake soap cut in half near, on and around that tree....take care of the deer problem first. Pine can only be trimmed in the cold winter months or it will go into shock and weep their sap and the tree could die. We have a severe problem with deer up in NE PA......you also should use dorment oil in the fall to keep bugs off of pine. You need to read the directions for dorment oil and wear long clothes & goggles & mask when spraying. I cut the soap in half and I wired it using the coated bendable wire. Looks like decorations on the tree. On some wooden fences, I used the 1/2 cake put a metal washer and screwed it threw the fence post or other wooden stakes in the ground about 4 ft high. I have about 80 fruit & nut trees......and no deer here....deer are beautiful but they bring ticks and they drop off when they are eating. Some ticks have Lyme Disease. They also don't like Ivory or dial soap....any smelly soap will work for 3 to 6 months. Any tree bark that is damaged you can use spectracide pruning seal for outdoor use only. I have been using it for 10 years. Shake the can real good and spray to keep bugs out. I would wait for the dead of winter to TRIM....and that would have to be a very short trim. Just a nip here and there to make it look straight.......If you can control the deer eating that tree you are going to control the damage. I had a neighbor up the road who stopped and asked me what on earth was I doing that was making the deer run thru my 20 acres............I had been using Target bags and I tied the handles onto the tree and made a tiny weep hole in the bottom and every time the wind will blow it made a funny sound.....and they did not like the big circle that looked like an eye. They only last 3 months......good for winter. At Lowes, Home Depot & walmart they have thin black deer netting that is almost invisible when put on the tree. We have several neighbor doing this and it keeps them from eating the tree especially during the winter.