I think my rabbit is ill...

Question
I have two rabbits...both of them were showing allergies..sumthing like ulcers on their anal surroundings a few days back which later healed...
Now one of my rabbit has a swollen anus while the other one is fine...i am really worried..what could be the problem?

Answer
Well, I'm not sure what the exact problem is.  I don't think rabbits are allergic to very much.  It sounds like their problem might be an infection of some sort.

You'll need to take your rabbit to a vet so the exact cause can be determined, and a treatment started.  You don't want your bunny to be in any discomfort.  And if the anus is swollen it might interfere with the rabbit collecting and eating his cecotrophs.