Yes you can. Tape the end of the pregnancy stick to her vagina until she pee's on it.
Yes, there are clothes available for your guinea pig; however, I do not advise you use them, it is uncomfortable for the guinea pigs to wear them.
only if guinea pigs are considered ''critters''
No guinea pigs cannot there wouldn't be enough space and guinea pigs aren't supposed to use exercise wheels that are usely in hampster cages (because they can easily hurt themselves).
shampoo
Guinea pigs are fine with towels, it doesn't hurt or annoy them in any way. Guinea pigs love soft materials so you should use them especially when cuddling them!
No, they do not use them.
you use Kitten formula!
Yes as long as you clean it regularly and wash it at least once a week. The best thing to use is fleece though, its warm and the guinea pigs love it! - Guinea pig owner -
so they learn how to use guinea pig communication
Yes, guinea pigs can be given a bath. In fact you should bathe your guinea pigs once every one to two months- just be sure to use specially fortified guinea pig or rabbit shampoo when doing so.
a nail clipper
Only if the paper has NO ink on it as ink has been known to be toxic to guinea pigs.