Death and survival from cannibals

There's a 17 year old survivor Alissa a girl that had beautiful long hair in the past that got pulled once in the apocalypse of explosions and lack of food people separated and a caniball pulled her hair her dad shot it she cut her hair and her dad disappeared she couldn't find him her and her mom her little brother and her sister got separated while running from bombs when the thing started which blew up food. And later canabism started her family wasn't found and she has to survive alone.. with her short hair... with canabals sometimes chasing her her with only her sharp stick then after canabals chase her she climbs on a very long tree gets down when they left which was 4 minutes that felt like forever and finding a Shiba uni a type of dog she thought it was pretty and took it she needed a companion and they travelled anywhere to find grass and maybe her parents the dog was supportive and fought with her