You decide to go for the gun. You quietly moved to the gun and picked it up. You left the room and entered the kitchen. You check the clip and saw it was half full. The gun also has a silencer on the barrel. At least you will be able to shoot the gun without alerting many animals. You looked out to check the front door of the building and saw it was opened but not damaged. You thought about what to do and you decided to kill the leopard. You hate the fact of what you will have to do but it's you or her, besides she is injured and will bleed out so it's a mercy kill. You aimed the gun at her head and after a minute to prepare yourself you fired the gun.
The shot killed the leopard and you quickly closed the door to outside and blocked it. You checked the rest of the building and the backyard and found no other animals in them. You covered yourself and put the leopard in a corner of the backyard. You found several days of food and drink in the kitchen and you remember the landlord was a paranoid one and found his stash of months of dry food, water, and other items such as three other guns and a fair amount of ammunition for them. You took all of the items to your apartment and after putting a latter in the backyard barricade the door.