Posted by guineapiggles on 22 Oct 2020
guinea pig on megazorb bedding

Megazorb is commonly used as a bedding for horses but it is also one that many guinea pig owners use too.  It is especially good for horses with respiratory problems so this could be a sign that it’s a good bedding for guinea pigs who are also very prone to these health issues. 

What is Megazorb

Made from virgin wood pulp fibre, Megazorb is a by-product of the paper making industry in the UK. There are also other brands such as Carefresh who also sell a bedding that is made in a similar way and this is more widely available globally.

What does Megazorb feel like?

It isn't a soft, fluffy bedding like paper or wood shaving beddings and resembles more of a “litter” type bedding. The pieces are small and can be a little hard so it’s definitely not what you would call “cosy”. When we tested Megazorb, we added soft meadow hay to the sleeping areas to add some cosiness and softness.

Is Megazorb absorbent?

Megazorb absorbs guinea pig urine pretty well and the wetness tends to soak down into the lower levels of the bedding.

Is it good for odour control?

It seemed to be good at masking the smell of any urine and ammonia smells but something we disliked was the unpleasant smell of the actual bedding itself. Of course this maybe personal taste and other people may not mind the smell but it is something you need to take into consideration if you’re thinking of using Megazorb.

Whereas pine has a natural pleasant wood aroma and the aspen, hemp and paper bedding that we tested had a neutral smell, Megazorb did not. The only way to describe it is that it smelt a little like dried cat food and this smell filled the whole room.

If you have outdoor guinea pigs then I don’t think the smell would be an issue but I can’t imagine anyone would like this smell in their home.

We haven’t tested other brands of wood pulp fibre bedding so can’t say if they all have this particular smell. This might be a particular feature of the Megazorb.

How often does Megazorb need to be cleaned out

As with all bedding, daily spot cleans are necessary to remove damp or soiled areas. 

It’s an easy bedding to clean out as it tends to clump so you can easily scoop out any areas that have been soiled in between full cleans.

Other than spot cleans, Megazorb seems to last for about 5-7 days between full cleans. This is about the same as aspen shavings and paper bedding. We found pine shavings and hemp bedding were a little more absorbent than Megazorb.

Is it dust free?

We found Megazorb to be quite dusty.  This was surprising because of the fact that it is supposed to be good for horses with respiratory problems. The bedding didn’t seem particularly dusty to look at but when adding it to the cage and then cleaning it out again, there  was noticeable dust in the air. It was the dustiest bedding we tested.

Can Megazorb be composted?

Megazorb can be put in your outdoor composter or compost heap and the piggy poops will add to the quality of your compost too!

However, do bear in mind that if using an outdoor compost bin, it will become full pretty fast with your weekly clean outs, especially if you have a large cage and a few guinea pigs!

How much did it cost?

Megazorb is a fairly cheap wood pulp bedding and worked out about the same price as pine shavings and just a little less than hemp bedding in our test whereas the Carefresh equivalent seems to be a lot more expensive. 

Remember that it’s important to weigh up all the pros and cons of an animal bedding and not just to pick the cheapest one.

Pros and cons of megazorb

There are advantages and disadvantages with any pet bedding and everyone has different ideas of what they like and what will work best  for them. Here are some of the pros and cons we found with Megazorb bedding:


  • Absorbs well
  • Fairly cheap
  • Can be added to the composter
  • Lasts well between cleans


  • Its natural smell is not very pleasant
  • Not soft or cosy bedding
  • Can be a bit messy
  • Need to keep buying as it’s disposable
  • Seemed dustier than alternative beddings


Megazorb was absorbent and was easy to clean out, especially when doing the daily spot cleans. It wasn’t too costly either. However, it has an unpleasant smell and is not a cosy or soft bedding. We also found it left quite a bit of dust in the air after adding to the cage and after the full clean. Megazorb isn’t a bedding that we would choose to use but we do encourage you to try different types including the Carefresh equivalent to find out what works best for you and your guinea pigs. 


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