Critical care sachets can be made up and frozen for up to 6 months.
If you constantly see droppings laying around that resemble small bunches of grapes then your rabbit may suffer from excessive cecals. Feed limited veg to rabbits suffering from excessive cecals
Rabbits can suffer from a hairball in their stomach and this can lead to a blockage and could be fatal. Rabbits cannot vomit, so they cannot pass hairballs like cats can. If you think your rabbit is suffering from a hairball then seek advice from your vet.