Some of the blue poison dart frogs in our collection have developed raised circular patches of beige colouration on their skin on their backs, has anyone seen or treated anything like this before? The frogs seem otherwise healthy and are feeding well and behaving normally, and the discoloured patches are not weeping or open sores, they almost look like they have been stuck on.

In one book we came across a description of something called 'bone rot' which starts at the skin and eventually reaches the bone if untreated, but I was unable to find any more on this on the internet.

Any insight as to what this might be would be very helpful! of course we will continue to monitor the frogs and will consult the vet if their condition worsens.