[racinghamster]

I don`t know what would have caused the mould to grow but biscuits in general can go soft if exposed to air. It could be that they have got moist? Or been a bad batch? I never feed dog biscuits to my boys. I did attempt it once from some odd shaped biscuits my pet shop kindly gave me that were broken when they were doing pre-weighed bags to sell but my hamsters didn`t care for them at all. They were the `shapes` dog biscuits that come in different colours.

But having read some articles since about hamsters developing itchy skin when they have been fed dog biscuits or cat/kitten products, it only strengthened my view on the reasons why I don`t feed them.