Do all blue roans...

[Katina]

No, they all don't 

[minimoo]

yep kizzy has white bit and bruno who is nearly black has one but you cant see it unless you move his fur but its there about the size if 20 pence peice

[Mollycuddles]

Molly doesn't but Alfie does and also his tail is mostly white like a flag.... like the idea of it being the naughty button but if so Alfies is stuck too

[badgeralbert]

Both Badger and Maisy have the white "blob" 

[Cazzie]

No, they all don't 

What a sweetie 

[clg79]

Dave has a white blob too. It isn't really diamond shaped though.

I have one without a blob  Georgi
she is the darkest Blue Ive ever seen the other 3 blues have white blobs so do the oranges  
as for black socks that are known in the bitcon lines I have a fair bit of bitcon in mine and 3 have black socks Bobbi hasent hes got lovely legs there all different shades of grey that follow in big streaks which I just love especaily when hes just been washed and blow dried it looks stunning hes quite light though  

Dave is also very dark and he ha Bitcon in his pedigree too (Break the Rules and Star Light) he also has the black stockings and his tail is still very white mostly.

[EmmaA]

Groove had a huge white blaze on his head. It grew longer than his black fur and used to flop into a parting he looked  like a mad professor  

[Sheryl]

Nope.  Kali doesn't!

[Neacy]

Harvey (light blue roan) has a white diamond shape on the top of his head no white ring tail though

[Nicola]

Molly doesn't but Alfie does and also his tail is mostly white like a flag.... like the idea of it being the naughty button but if so Alfies is stuck too

Add another Alfie to that naughty button list    He has a small white patch on the top of his head too, it's the most perfectly white bit on his whole body, it's small but it's really Persil white with no black hairs in it at all. He's also got an even smaller patch on the side of his muzzle, it looks like a white freckle, and one on one of his front paws but his head one is the most noticeable, I call it his snuzz spot    His dam has exactly the same markings. He doesn't have a ring on his tail though, or at least not that I've noticed.

You can see all 3 of the marks here although the black fur on his head has started to go a bit tufty since he was castrated and sometimes covers it until I pluck it out again...

[tiamaria]

Molly doesn't but Alfie does and also his tail is mostly white like a flag.... like the idea of it being the naughty button but if so Alfies is stuck too

Add another Alfie to that naughty button list    He has a small white patch on the top of his head too, it's the most perfectly white bit on his whole body, it's small but it's really Persil white with no black hairs in it at all. He's also got an even smaller patch on the side of his muzzle, it looks like a white freckle, and one on one of his front paws but his head one is the most noticeable, I call it his snuzz spot    His dam has exactly the same markings. He doesn't have a ring on his tail though, or at least not that I've noticed.

You can see all 3 of the marks here although the black fur on his head has started to go a bit tufty since he was castrated and sometimes covers it until I pluck it out again...

Thats the shape of my Rosie's spot, her diamond was a bit bigger! I like the snuzz spot! 

[chickrockguitar]

Nope. Marlee has no white dot thingy.

[deano]

Alfie has what looks like 4 black socks on his legs a little way up and has a white bit that goes inbetween his eyes and down the middle to his nose.  very cute