Dad is a grey katmoget, which makes sense from his pedigree. It's sort of palely expressed - the suggestion is that there's a 'pale katmoget' gene as well as a 'katmoget' ones, so perhaps he's that. Certainly he's not as definitely marked as my grey katmogets.
Mum is showing a 'katmollet' face there - genetically I have no idea what that is, neither has the paper I was reading.
The lamb looks like a grey katmoget, but with her dad's paler version of it. See how she's darker underneath. But that's not quite right as she has her mum's katmollet face......
Here's my uncomplicatedly-grey-katmoget as a newborn lamb