Yes, you are correct about the sludge being caused by pellets made from alfalfa. I was just going to post a message about it. We had an emergency at the bunny sanctuary late last week and it turns out our little Victoria had bladder stones !!!!
which are also caused by too much calcium in the diet. The vet, who has always said absolutely NO pellets should be fed to bunnies, was nice about it but said we have to stop the pellets altogether or risk serious harm to the bunnies.

We have approx. 65 buns at the sanctuary and used the pellets as a back up food in case the more aggressive bunnies chased the timid bunnies away from the feeding stations. We are also switching from buying "hay" from the local farmers to pure timothy hay. It's going to be so much more expensive, but it's not worth sacrificing the bunnies health. Fortunately they think Victoria will be able to pass the stones and not need surgery. She IS acting spunkier so we are hopeful.

So please everyone with bunnies, take this notice seriously. Just because your bunny may not exhibit signs of the sludge or bladder stones (so painful!!!) do attempt to cut way back, if not completely off, rabbit pellets. Thanks.