Having pets is something of a double edged sword. On one hand they are great fun. On another they are something else to worry about. Recently we noticed that the hair on our pigs wasn't as shiny and clear as usual, so it was down to the vets for a check-up. The diagnosis was that they had mites, which they probably picked up from the hay. Some treatment was applied and we thought that was that.
Tonight I took them down for a follow-up appointment and it turns out that they are not much better, which is a pity. They've just had a follow up treatment and we've got some ointment (should that be oinkment for a pig?) to apply as well. They seem happy enough and all the food is disappearing each morning, so I think they'll be fine.