As long as the guinea pig has food and water, and is protected from domestic dogs and cats (which can attack a guinea pig), it is fine to leave it for several days. If you plan a holiday, all you need to do is leave instructions with a trusted neighbour for feeding and changing your guinea pig's water. Make sure your guinea pig is well sheltered, and won't get either too hot or too cold during the day.
If you leave it long enough, yes. :(
Dry food you can leave out for a week, but vegetables you have to replace every day. If your guinea pig hasn't eaten a type of vegetable at all, then don't give it to them again, as they may not like it.
At the age of 8 weeks
The guinea pig will not give the cats diseases if you make them friends or leave them seperated.
No. Do not under any circumstances leave your domestic guinea pig unattended.
not necessarily; if you leave one guinea pig in the cage with the sick guinea pig, the guinea pig that is not sick can get sick; you should separate them just to be safe but if the guinea pigs start to get lonely, put them back together
you mean girl guinea pig? Right?!? Because if not, at LEAST two weeks.
Take it to the guinea pig dentist
No, leave them with the mum guinea pig, she'll look after them. If you take them out too soon it could be distressing for the mother pig.
It depends how close you are to your Guinea Pig, and how much they like you.
your should hold your guinea pig for about 30min to an hour each day
you should probably brush your Guinea Pig for about 5-10 minutes