A constant supply of hay is essential for guinea pigs!! A misconception about guinea pig diets is that they should get the occasional hay, however hay alone is supposed to be 80% of their diet! The amount of times I see a small quantity of hay in their cages is astounding and disappointing.
First things first, a guinea pig emergency kit does not in any way shape or form replace a vet visit! This kit is only to provide temporary relief for your pet until the owner is able to take their guinea pig(s) in for medical treatment.