"They threw meat at him in the canteen because he was a vegan."
The court heard how he would have to go outside at lunchtimes to avoid the bullies and had started smoking heavily as a way of coping with the torment.
Despite his mother approaching the school several times, the bullying continued, she claimed.
The inquest heard there was no evidence that Louie had intended to kill himself, and that there was no suicide note found.
His father Graeme wrote to the coroner, telling him he did not believe his son meant to take his own life and was just "messing around".
Louie was a member of the Hertford Sea Scouts, learning how to tie all the knots and knowing all their names.
Following his death his family set up a Justgiving page to raise money for the Sea Life Trust in his memory.
The page, which has collected £1,759.97 so far, reads: "It is with deep sadness that we announce the death of Louie Tom Fenton who passed away on 19 January 2017.
"He loved the sea and was deeply committed to conservation, the environment and sea life.
"Instead of flowers for his memorial service, we know he would have preferred a contribution to this charity."
Richard Hale School gave no evidence at yesterday's hearing, but police notes from an interview with head teacher Stephen Neate were read out.
The notes confirmed Louie was a heavy smoker and hung around with older children.
Mrs Fenton added: "I never had the feeling that Louie was so depressed that he wanted to die."
Coroner for Hertfordshire, Geoffrey Sullivan, said he would write to the school to ensure their policies for dealing with bullying and self harming were up to date.
He said: "Given what you have said I shall write to the head teacher at the school to ask if policies are in place and up to date in respect of pupils who experience bullying and do self harm."
Stephen Neate, Headmaster at Richard Hale School, told MailOnline the school was aware Louie was being bullied, but the meat-throwing incident was not reported to them by him or his family.
He said: "The whole school community was deeply shocked by the death of Louie Fenton in January 2017. Our feelings are, and have always been, with his family.
"We remembered Louie through assemblies at school and in prayers with the whole school at St Pauls Cathedral. Students who have been affected by his unexpected death have been supported.
"We were aware of concerns about Louie being unhappy at school and we were actively engaged with him and his family to address these issues.
"However, at no time were we made aware of the incident in which meat was allegedly thrown at Louie.
"This was never reported to the school by Louie or his mother, has not been substantiated by any member of staff at school or by any of Louie's friends in Year 9."
Mr Neate added the school is renewing its policies to make sure "lessons are learnt" from Louie's death.
He said: "The safety, happiness and wellbeing of all pupils at Richard Hale is of paramount importance and the school prides itself on its pastoral care, which has been recognised in our most recent Ofsted report.
"We annually review our anti-bullying policy and advice on bullying, plus the school's response to it, is displayed in every classroom.
"We will now review our procedures, ensuring that all agencies who worked with Louie and his family, both inside and outside the school, learn any lessons from this tragic case."
Louie was due to go on a school ski trip in the weeks after his death.
His mother and father said he was excited about the holiday and had discussed who he wanted to share a room with.
Paying tribute to him, a statement from the Fenton family read: "Louie was a wonderful boy, much loved by family and friends alike.
"He had wide ranging interests and was very passionate about them.
"In some ways, he had wisdom and concerns way beyond his years, and in other ways he was a mischievous, enthusiastic boy to whom the world offered the opportunity of discovery and adventure.
"Louie had a wonderful sense of humour and an infectious giggle.
"On the day he died he had appeared excited by gifts he had received in the post, he mentioned a couple of issues at school but did not appear unduly troubled.
"We feel his loss deeply, he made our lives better by being with us. He still had so much to offer."
Commenting on an online memorial page, friend Joey Green said: "I was so sad to hear about Louie. I have lots of fun memories of him when we were little at Millmead.
"I remember at the park you taught me to swing on a swing.
"At lunch times we would meet by the toad stalls and chat, climb trees and laugh. I will always remember you like this.
"My thoughts are with your friends and family. You will be missed X"
His aunt Lucy Roper said: "My lovely little Lou, I am going to miss you big time!
"We had so many in-depth conversations about life - our love of sharks and the fact that they get a rough deal from most and should be appreciated more.
"I could write for hours as you were such a character and there are many many lovely and funny stories to tell and remember you by.
"I'll never forget you Louie.
"Always in my heart xox"
Mr Sullivan gave an open verdict at the conclusion of the inquest, ruling that he was not convinced that Louie meant to kill himself.
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call 111.
If you need to talk to someone, the following free helplines operate 24/7:
DEPRESSION HELPLINE: 0800 111 757
LIFELINE: 0800 543 354
NEED TO TALK? Call or text 1737
SAMARITANS: 0800 726 666
YOUTHLINE: 0800 376 633 or text 234
There are lots of places to get support. For others, click here.
