My leo has been sick for about a month now and I finally think I have a stool for my vet to use this will be try 3 because nothing has been good enough. How can I keep it fresh enough for him to use everything has been runny and dries to fast before I get to it so I set my alarm every few hours to get this one. I added a drop of water should I do this till I can get to the vet in about 12hrs? Its already in a plastic bag. Thanks for any help