Hi and welcome
New guinea pigs often don't drink straight away but the individual water intake can vary hugely. it also depends on how much watery veg you are feeding. Diet recommendations have changed quite a lot over the last decade.
Since the need to drink comes before the need to eat, eating healthy piggies are generally not dehydrated, so you need not worry in that respect.
Long Term Balanced General And Special Needs Guinea Pig Diets (also contains a chapter on drinking since the guide looks at diet as a whole and at all possible food groups in detail)
Things have changed a lot over the past decade and we have learned a lot more.
You may find our practical information collection for new owners helpful to catch up and refresh your memory; it deals with many of the little practical how-to details that new owners come across and that can throw them - from settling in to understanding behaviours and daily care/learning to spott what is normal and what not:
Getting Started - Essential Information for New Owners
We also have a very extensive information resource on a wide range of topics for owners of all levels of experience; it is one of the largest currently around. There is always something more to learn, new developments to integrate into your daily care and interaction and extending your understanding of guinea pig behaviours and social interaction as much as their own species needs. We are all still on a learning curve, no matter how long or how many guinea pigs we have had. Our forum also specialises in practical support care during illness alongside any necessary medical treatment.
Comprehensive Owners' Practical and Supportive Information Collection
We are here for you for any questions you may have along the way. We are a friendly and supportive place and will answer them all, no matter how large or small, in a friendly and helpful way.