02/11/2022
What can I feed visiting wild hedgehogs (that is good for them?)
Winter is coming, and our wild hoggies need our support. However please do not encourage them into your garden if you have a dog with a prey drive who will pick them up. This causes terrible injuries to hedgehogs. As winter approaches, young juvenile hogs especially are desperately trying to gain weight to survive hibernation. At the same time their natural food sources are dwindling and they increase their eating of slugs and snails (which are usually a tiny proportion of their diet). This hugely increases sickness and death from lungworm and other internal parasites which are carried by slugs and snails. Offering supplemental feeding throughout winter really helps support your local hedgehog population and reduces risk of death from illness and starvation. Contrary to popular belief, hedgehogs wake regularly throughout winter, and often don’t hibernate until January. Providing supplemental feeding throughout the year, supports nursing females, babies, and autumn juveniles, as well as adults struggling with dwindling natural food sources.
Wild hedgehog rescues regularly see the devastating impact of feeding wild hedgehogs mealworms. Mealworms are very high in phosphorus, and hedgehogs will selectively eat them in preference to other foods offered alongside them. High phosphorous levels cause calcium to be stripped from the bones, to maintain blood calcium levels, and this leads to severe metabolic bone disease - painful, thin, weak and bendy bones, multiple breaks/fractures (eg of legs, ribs, pelvis, spine) and terrible pain. The only outcome 99% of the time is to euthanise the hedgehog to alleviate severe suffering.
Imagine this from the perspective of a hedgehog. You may be only putting out a few mealworms, but hedgehogs can travel miles, and visit many many gardens. This means they may selectively only eat the mealworms from every garden they visit, a bit like offering a child the choice between sweets and a healthy option for every meal - they are likely to always choose the sweets! To prevent bone disease, the ideal calcium to phosphorus ratio of food is 1:1 or 1:1.5.
The table in the images show calcium and phosphorous ratio’s in commonly fed foods, you can see why this is a problem..! Muesli type meals sold for hedgehogs are also high in phosphorus, (they usually contain mealworms, peanuts, sunflower seeds and sticky dried fruit which rots teeth). These are marketed for hedgehogs by businesses that want to sell their product, but that doesn't mean they are appropriate. Likewise feeding muscle meats on their own, eg chicken, beef etc is also extremely high in phosphorous.
I write this with the hope that if you are reading it, you care greatly about the welfare of the hogs in your garden, and do not want to feed them things which are known to be harmful to their health. Please, on your part, also assume that this is written with the same aim, and with experience of caring for lots of hogs (hundreds), and also the shared experience of a huge UK network of wild hedgehog rehabilitators, wildlife vets, and wildlife hospitals.
So, in answer to the question, what can I feed visiting wild hogs, that is good for them..?
> It's easy.
1) A hedgehog specific biscuit, or
2) Cat biscuits (any flavour will do*) or
3) Wet cat or dog food (any flavour will do*).
*please read further on for more details
It really IS as simple as that. So if you wanted a short answer, please don't feel you have to read any further 🙂 For those of you with all the if’s, but’s, and maybe’s, please do read on.
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First, more information about what you CAN safely feed them as above...
Hedgehog specific biscuits:
Eg Ark wildlife original hedgehog biscuits (NOT the Ark mix).
https://www.arkwildlife.co.uk/product/hedgehog-food-uk/ This doesn't get eaten by the neighbourhood cats, the hedgehogs like it (please bear in mind that it WILL take them a few days to get used to a change in food), and the wild birds finish off any bits leftover. I have no affiliation with Ark wildlife, its simply that our wild hogs will eat it. There are other alternatives hedgehog biscuits available, however I cant attest for the nutritional balance or completeness of others. Biscuits are also good for their teeth, do not freeze in winter, or go off and attract flies in summer.
Cat Biscuits:
People often ask me which one? That depends entirely on you and your budget. It does not need to be a kitten biscuit (unless you know you have some very young hogs visiting just out of their nest) - cat biscuits are small enough in size for hogs to manage. The flavour does not matter. I repeat, the flavour does not matter. Chicken, fish, rabbit, duck... its all protein just the same. The “dont feed hedgehogs fish flavoured food” is an old wives tale which gets endlessly circulated on the internet. And for those who say “but fish isn't a natural diet for a hedgehog”, how many hedgehogs have you seen hunting chickens, rabbits or ducks...? A good place to get cat biscuits in bulk at a low cost per kilo is zooplus.co.uk, we use Smilla which is a complete food, and is as low as £2.13/kg, and wild hogs eat it readily. Rescues up and down the land feed cat and dog food which contains fish (and all other proteins). As far as I know, no hedgehogs have turned into snorkelling fish stalkers in the local ponds.... Cat biscuits are also good for their teeth, do not freeze in winter, or go off and attract flies in summer.

Wet Cat or Dog Food:
Again, people often ask me which one? And the answer is the same as above - it depends on your budget, and the flavour does not matter, for all the reasons already discussed above. We dont feed wet food to our wild garden hogs here. It gets extremely cold in winter and is at risk of freezing, and in warmer weather it is at risk of going off and attracting flies, which is the last thing visiting wildlife needs.
Still with me? Great. Read on for more answers to the common issues raised by the good folk who feed hedgehogs in their garden….. all the following are from common conversations.
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But the hedgehogs will only eat mealworms!
Okay. This has to be the most common thing rescues hear, usually in a frustrated despairing tone..! Let me ask you something. Would you feed your child nothing, and I mean nothing, but chocolate? No. What about if they had a tantrum and refused other food? Im guessing still no. Thats because you have some common sense and know that regardless of the fact they love it, a diet of chocolate is not good for them.
Please apply that same common sense to the wild hedgehogs in your garden. Yes, they love mealworms. Yes, if you've been feeding loads of mealworms and you change to a proper, nutritionally complete diet, they are likely to initially ignore it. But they will eat when they are hungry! And I know this because every year, we admit ill hogs, from members of the public who insist they will not eat anything apart from mealworms. And every single one of those hogs, when mealworms have not been on offer, have caved in and eaten the food available. For some thats taken a day, some two, some three or four days. BUT if you are STILL offering a bowl of mealworms alongside other food, of course they are going to eat the mealworms and leave the food (think of the child with chocolate!). So PLEASE ditch the (expensive) mealworms, so that they only have healthy food on offer. And wait. They will come back and eat.
But if I feed proper food, the cats/dogs/fox/(insert relevant animal as appropriate) will eat it!
You have two choices - feed a hedgehog biscuit/mix the cats wont touch such as Ark original, OR place the food in a cat/fox proof feeder. You can buy these (riverside woodcraft do a great feeding station, see link below). Or you can accept that the local felines might be happy to take the odd bite of an evening. We have several open feeders with cat biscuits, and despite this we lose very little to local cats (we have a wildlife camera).
https://www.riversidewoodcraft.co.uk/eco-hedgehog-feeding-station/
And some others:
https://www.wildcare.co.uk/hedgehog-house-kit-11085.html
https://www.arkwildlife.co.uk/product/hedgehog-feeding-station/
or make one VERY cheaply like this, from a plastic under bed storage box....
https://www.wildthingsfood.co.uk/category/how-to/
https://littlesilverhedgehog.com/2020/06/04/hedgehog-cafe-mark-ii/
But cat food/hedgehog food/dog food isn't their natural diet..
Neither are mealworms. Or peanuts, or biscuits, or cake, or wagon wheels, or any of the other, frankly ridiculous things which people feed wild animals. However, cat and dog food is nutritionally balanced and complete, and will NOT cause skeletal deformities, raging tooth decay, nutritional deficiencies or spine and fur loss - all of which occur with an inappropriate diet. Mealworms do not exist in the wild. Nor do any of the items above...
So what is a hedgehogs natural diet?
Hedgehogs are not insectivores as many people think. Studies have shown they are omnivorous, and opportunistic feeders. These studies have analysed faeces and stomach contents of wild hogs, and food preference trials in captive wild hedgehogs.
The main bulk of the diet is caterpillars, beetles, millipedes, earthworms and earwigs. Slugs and snails form a very small percentage of their diet (and transmit deathly lungworm). They also eat frogs, toads, small mammals, carrion, and eggs. It is thought that any fruit and vegetable matter is eaten incidentally (i.e. attached to their food) rather than intentionally. Diet will vary with habitat - and available species.
The aim of providing supplemental feeding is not to try and replicate their natural diet - you cant. But you CAN provide a nutritionally balanced food to support their natural diet.
But why cant I feed dried fruit, sultanas, cake, biscuits, wagon wheels, etc etc..? They like it..
So does the child who only wants to eat chocolate... but seriously - rescues are admitting an ever increasing volume of hogs with severe dental disease, even in young hogs. How severe you ask? One rescue had a hog with such severe dental disease, the jawbone had become infected and crumbled. Hogs cannot clean their teeth. Sweet sugary foods cause dental decay in other mammals too. PLEASE do not feed these things.
But I like giving them a treat..
They are wild animals. The concept of treats is a human one, very tied into human emotion. Wild animals do not understand treats, they will eat what is available. The best way of ‘treating’ your wild hogs is to feed them safe, nutritionally balanced and appropriate food.
But the gardener/ my neighbour/someone on the telly (insert appropriate term here) says its fine to feed them mealworms…
Ask yourself what they know about the care of wild hogs? How much research have they done? Sadly there are still some less enlightened and up to date rescues who tell people to feed these items. All I can say to you, is that the above information is evidence based, and supported by some of the largest and most experienced rescues and wildlife hospitals in the UK.
Lastly, if you've made it this far, thanks for reading, and for caring about our native wild hoggies.
Lynda