A woman has told of her horror at biting into her McDonald's burger to find something unpleasant hanging out of the centre.
Nicole Campbell had just started to eat her McChicken sandwich from the outlet's drive-thru when she noticed the strange contents.
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She believes it was an animal tail while the fast food giant insist it was found to be a chicken vein after investigation.
Ms Campbell told Belfast Live: "I couldn't believe, it I was about to be sick when I saw it.
"I went back into the restaurant and showed it to the staff member and they said, 'Oh I don't know what it is, but it's not a mouse now don't be worrying, it's probably just a wee bit of the chicken bone or something'.
"They offered me a food voucher for the next time I came in, I told them no way, I'm only after finding a tail in my burger."
The fast-food outlet offered Nicole a voucher to say sorry
The 22-year-old left the burger with the outlet, in Dungannon, which took her contact details and said they would investigate and be in touch.
Nicole says days passed and she had no word from McDonald's about the incident which happened on February 6.
One week after the incident, Nicole said she still had no response from McDonald's despite both herself and her mum calling numerous times.
She said: "Eventually a fella from their offices in England rang me, and said they'd got the burger back and it came back that it was just a chicken vein.
"It's definitely not a chicken vein. I couldn't believe it, the size of the piece that came out of it, it definitely wasn't a vein.
"I told him I would take it to the papers and he didn't really want to know.
"He also said he sent me a letter, which I told him I hadn't got, so he said he would send me an email to confirm that they had been speaking to me.
Nicole received the sample back in the post after the lab had checked it out
"I got another email the next day offering me a £20 food voucher, I mean who would want to go back and eat there again, and then a £20 One For All gift voucher."
Nicole says she was even more dismayed when McDonald's returned her sample in the post, without any correspondence or note.
"An envelope arrived on Saturday past and literally it was an envelope with a test tube in it, there was no letter with it, no note, no correspondence whatsoever," she said.
"There was no report with it to state what exactly it was after testing. On top of that, the sample they sent me back wasn't the same thing as I found in my burger.
"I've no idea what it is, but what they sent me back is a different colour and shape, it's not what I found in my burger."
But she said it did not look like what she found in her burger
A McDonald's spokesperson said: "We would like to apologise to Miss Campbell if our service has fallen short of her expectations.
"Following a full investigation, the object was examined and found to be a chicken vein which would have caused no harm if consumed.
"Our chicken is made from 100% chicken breast meat and is frozen in factory before arriving in restaurants to be cooked. It is therefore extremely unlikely this could be anything else.
"Our customer services team have been in touch with Miss Campbell on a number of occasions to offer our apologies, and a gift voucher which she has declined.
"We are disappointed that this seems to be unsatisfactory for her."