Yesterday I got 2 new guinea pigs from the pet shop. They seem comfortable and like exploring the rest of the cage but they won't touch the water bottle. They had a water bottle in the cage they came from and they both seemed to actively drink from it whilst we were there. However, they are not even touching their water bottle now! I am getting worried but have been feeding them vegetables so hope they are all right for now. Any ideas on how to get them to drink from the water bottle? Thanks.