What does the expert think?
Dr Clare Pettinger is a lecturer in public health and dietetics at Plymouth University. I asked her what she thought about our experiment.
"It's a big thing to embark on. Being vegan or vegetarian is as healthy as any other diet but you have to be careful.
"A lot of people stop eating meat but don't give a lot of thought to what that is providing.
"You need an appropriate combination of amino acids and the easiest source is through meat but they can also be found in things like soya and quinoa."
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Dr Pettinger said parents would have to be careful that the high fibre diet did not affect their children's absorption of minerals, such as iron and zinc. However, foods such as tofu and beans contain these healthy essentials.
It's also vital that children get their calcium and omega 3 for growth and brain development. Omega 3 is usually in oily fish but can be taken as a vegetable-based supplement.
"You are not going to do yourself any harm by cutting down on processed foods, fats and sugars but you've got to get the balance right," says Dr Pettinger.
"You've got to do your homework on a vegan diet.
"Also, such a diet might not be accessible to those living under tight financial constraints as many of the food items are costly."
Was it expensive?
We found individual items costly. The soya milk we bought was £1.39 a litre, compared to 78p for a litre of semi-skimmed. For a large family, that would add up.
Also, items such as soya spread and soya yoghurt were more pricey than their dairy counterparts.
We spent about £120 in total, stocking up for the experiment – about the same price as our normal weekly shop, and we weren't being strict on budget.
We did have to shop around though. It was not possible to get everything in one supermarket and we had to go to some specialist shops.