I have a friend who breeds rabbits for meat. Last I knew she had about 100 rabbits or so. Unlike past years this year she has had a problem with mucoid wiping out her weanlings. Nothing she has tried has worked. The food she feeds is high in fiber, she tests the water once a year, the cage are kept clean and aren't overcrowded. The adult rabbits are happy and healthy. Yet the mucoid issue just won't go away. Even her vet is stumped. Anyone else been having similar problems this year?