Just realised I missed a couple more...
Nik - your lad is another black tobiano.
Nasring - yours is definitely sabino (and all the roaning on his body is down to sabino). He may also be rabicano - can't see his tail well enough to say for sure, but rabicano causes 'skunk tail' and also roaning that's heavier on the quarters than anywhere else.
An interesting point with white patterns like sabino is that they tend to be more loudly expressed on red-based horses.
Nik - your lad is another black tobiano.
Nasring - yours is definitely sabino (and all the roaning on his body is down to sabino). He may also be rabicano - can't see his tail well enough to say for sure, but rabicano causes 'skunk tail' and also roaning that's heavier on the quarters than anywhere else.
An interesting point with white patterns like sabino is that they tend to be more loudly expressed on red-based horses.