Harvey, whose biological dad is professional footballer Dwight Yorke, was diagnosed with blindness and Prader-Willi syndrome from birth, and he is also on the autistic spectrum.
The 39-year-old mum recently shared a sweet video with her 1.7million Instagram followers, showing 15-year-old Harvey helping his mum with the horses.
The caption Katie wrote said: ‘Harvey helping around the stables bless it’s taken ages for him to even learn how to try and sweep with a broom bless.’
As Harvey swept the stable floors, Katie can be heard off camera saying: ‘You’re doing a good job’ to which Harvey replies: ‘Awesome.’
Katie asks her son, ‘do you love the pony?’
‘Yes mummy,’ he replies, using makaton sign language.
Katie then applauds him for his ‘good makaton’, which is a language using signs and symbols to help people to communicate. It’s designed to support spoken language and the signs and symbols are used with speech, in spoken word order.
Support from viewers quickly came rolling in, with many fans amazed at how ‘superb’ Harvey is.
‘Such an amazing mum no one can take that away from you!’ commended one fan.
‘Amazing progress KATE .. fab mummy,’ agreed another.
‘He is just so adorable. What a lovely boy he is. Absolute credit to you’ exclaimed a third fan.
‘Superb Harvey 👌 You truly are an amazing Mother,’ agreed a fourth.
Others left messages in praise of the pair’s ‘amazing bond’, adding that Harvey is ‘Brilliant with the makaton!!’
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‘Should be mandatory in schools now days!!’ one declared. ‘Communication is the way forward for our kids today!! 👍
Harvey, who sadly over the years has been the target for vile internet trolls, is part of a big family as mum Katie has two children with former husband, Peter Andre, Junior, 12 and ten-year-old Princess.
In addition Harvey has siblings from Katie’s current husband Kieran, Jett, three and two-year-old Bunny.