If the holes are relatively small, the guinea pigs can go inside your house (not outside as predators will come and attack/kill them and it will get way too cold for them) then it will probably be ok. For the bedding, if you have got a shredder then that will be a good temporary bedding. It should never be used as a permanent bedding because it isn't very absorbent, but it will do.
Lay down some newspaper covering the whole floor, then put plenty of shredded paper on top. Add the timothy hay to various places in the cage, put in the food bowl and water bottle and that should be fine. Guinea pigs need pellets or dry food every day and without knowing which kind the piggies had, you're stuck.
Giving them different ones to what they have been used to can cause tummy upsets and make them ill. Guinea pigs need lots of fresh veggies every day, so your going to need to give them extra since they can't have dry food. Fruit should be given in moderation, just a few slices should be fine for now.
Here is a lsit of all the types of fruits and veggies they can and can't have: THESE ARE ALL SAFE FOR PIGGIES: Red or green bell peppers - About 1/8 a day, avoid the seeds. Broccoli - Can have quite a bit but too much cause gas. Carrot - A lot of this will help stregthen and grind down their teeth which continue to grow all through their lives.
Kale - Lots of this Vitamin C rich vegetable a day will really help with raising the Vitamin c level up. Romaine lettuce (not iceburg lettuce) - Iceberg is too watery and isn't at nutritious as romaine which they can eat a lot of and they love it! Celery - Try to give them less of the long parts and more of the leaves as there is a small chance the strings may get caught in their digestive systems.
Fresh dandilion leaves (from garden) - Can eat plenty of these. WARNING! Any porducts used on the grass such as WEED KILLER can KILL THEM!
Fresh grass (from garden) - Can eat plenty of this and you should get a run so they can munch and graze all day long! WARNING! Any porducts used on the lawn/grass such as WEED KILLER can KILL THEM!
Baby tomatoes - Only a few a week and remove the seeds first! Parsely - Contains LOADS of Vitamin C and you can give a lot of this a day. Cucumber - Can eat lots of and is juicy and yummy for the pigglers!
Apples - Only give in moderation - my guineas love it but it is a shame it is too sugary for them to eat everyday! Pears - Same instructions as apple. Seedless grapes - Green or red grapes.
HAVE to be seedless becuase they can choke on the seeds. Only a few of these a week. Satsuma pieces - Only a few (the same as most fruit) as they are sugary and acidy and this can hurt their little lips.
If you spot any sores or scabs then stop feeding them immediatley. Must be without pips. Corn on the cob - Dried corn is unhealthy for them , so only give fresh corn and not much of it.
Banana - Only a few slices once a week (same as any other fruit).
No wood shavings! That will cause very severe respiratory issues. I'll try to keep this simple and short... but it won't be easy.
Guinea pigs need timothy hay, all day, every day. It helps with teeth and digestion. You can feed the pigs things like romaine lettuce (NOT iceburg!
Romaine is healthier, and long, and comes in bags of three or four. Iceburg is round and unhealthy), bell peppers, cherry tomatoes, etc etc etc. There is a lot they can eat, but also a lot they can not. Check out Guinealynx.com Get the pigs PLAIN GREEN PELLETS.
Nothing else in them, especially not seeds! Timothy hay based pellets are the very best. You need to get a WAY, WAY bigger cage!
Small cages can cause a lot of health issues. Check out guineapigcages.com for how to build one fairly cheap and easily. They are called C&C cages.
Basically, you get plastic cardboard (coroplast), and wire shelving grids (the kind that you might make shelves out of for children), and make a cage. The coroplast is the base. I have found that most guinea pigs will not climb over the edge of the coroplast, so you may or may not need the shelf things.
It does not cost much... please look into it! It's a million times better than any other cage you can buy. They even sell some ready to assemble.
As for bedding- do a layer of newspaper, then towels on top of those. You can put fleece on top, and wash the fleece a certain way so that urine goes through, but it is quite difficult to explain. You could google "guinea pig fleece" later, but for now you could just use towels and wash them daily.
Other than that, you should take them out of the cage once a day and hold them and let them run around. DO NOT BUY THOSE HORRIBLE ROLLING BALLS! That will disfigure them and harm their spine.
They can play in cardboard boxes... but they get all soggy with pee, so you will need to replace them. Toilet paper rolls most certainly will not be of any use to them. Guinea pigs are pretty big.
I usually get some boxes and cut little doors in them. They will sleep very very happily in there! As for their owner... -sigh- you probably won't see her again.
If you really do not want the pigs, give them to a shelter specializing in guinea pigs! I am afraid a regular shelter would likely just euthanize them. EDIT: Yes!
Put them in that play pen! I must have missed that part. The play men is a VERY good idea!
You may want to get coroplast if you want a base, but otherwise, that is good.
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