I've been away for the last ten days and whilst grooming my mini schnauzer today I've noticed a cluster of tiny bumps behind her knee, on both legs. They are mostly flesh coloured and the cluster is about the size of a 20p coin. I've never noticed them before and wondering what they are? She hasn't been scratching/itching but has seemed slightly less hungry than normal. But this is usually how she is after we've been away. Any ideas would be appreciated. Thanks.