Thanks very much for the advice

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Unfortunately all shelters within 3 - 4 hours driving time from me have no guinea pigs at the moment and don't get them very often so my only choice is to buy them. I will make a last check before I do at the shelters but its not likely to happen

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I'm waiting for a week or two before getting them as there is some very hot weather coming up, 104Fº & 105Fº for the next two days.
For the fun factor, with my rabbits I used to take them for walks daily, do guinea pigs tend to enjoy that as much? I will have to buy a smaller harness though x]
Also, my rabbits (as they were outside animals) were kept in what most of you guys would call a sort of 'day cage' I guess but it was very hard to clean it out properly so I'm going to hopefully buy a hutch, however I've been looking and don't really know how to tell if the wood is the right type or treated etc as I've heard you need to have un-treated wood. I guess the best policy is to ask the shop-owner!
I've been told to get 2 girls instead of 2 boys, however I've had two boy cavys before that lived together and they got along fairly well but every shop just shoots me down when I mention it so I will be getting 2 females I guess.
Took me a while to find a good pet shop though. Its good when it comes to guinea pigs and rabbits. I saw the most adorable rabbits x]! But I don't want to go through Myxo again.. I was fairly annoyed at how they treat their Betta fish though, they were extremely depressed and were in the tiniest containers I've ever seen! I was so surprised at how opressed these fish were as my Betta seems to be hyper all the time, I love him to death! Its hilarious to watch. Anyway, off topic here! I rant too much!