Our boar who is 4 1/2 had surgery on 22nd April to remove a large stone from his bladder. From which he recovered well and was back to his old self. He was and still is on metacam reduced to 0.2 ml per day. However he has started squeaking more again when he wees and we have just noticed this morning that there is again blood there when he wees. Can it be another stone? It will only be 3 weeks on tue since his op? He has always been on a low calcium diet. He gets loads of hay, redigrass, burgess excel nuggets (but he doesn't really eat a great deal of these) typical veg are cucumber, lettuce, carrot, broccoli,celery. Any advice would be greatly received. Many thanks