Why is breeding two blues so bad?

Hi,
Why is breeding two blues together so bad? Does anyone know where to find the scientific research that says that breeding two healthy blues that are not related, DNA tested for inherited illness, and have a inbreeding coefficient less than the breed average is bad breeding.
I keep seeing people on this forum say that blue to blue is bad but say nothing about blue to red breeding, which would lead to the chance of blue fawn pups, blue fawn colour is not in the breed standard.
I have researched the subject and cannot find any scientific research that says that breeding two blues is bad breeding, i have found papers on dog colour genetics that says that the dilute gene is healthy and it is an old wife's tale that the dilute gene is a sign of weakness and illness.
The only illness i have found that is associated with the dilute gene is Alopice of colours diluted, but this not only effects blue's, it effects most colours including black and not only dilute colours, it is most likely caused by to much inbreeding in the past and not the colour genes.
I live in France and the only breed club is very anti blue, they are trying to change the breed standard to exclude any blue that is not solid blue. In France if your staffy is not pedigree it is classed as a cat 1 dog (pitbull) and there are lots of regulations to respect. The french breed club says that in the uk blue pups are killed at birth which is false because blue is the most popular colour at the moment in the uk with the most number of births registered with the kennal club.
I would be grateful if any one could point me in the direction of any scientific research about this subject if it exists.
Thanks
Paul

Not so bad if they have been health checked and done correctly its the back yard breeders who do it for money who just want to make a bundle of cash rather than have healthy pups

I don't want to offend anyone and I don't know any scientific evedince but as far as I am aware , blues have more skin problems and lack of pigmentation that is required , there are far fewer blues that I have seen, that conform to breed standard. When breeding it should be two excellent examples of the breed and the most suitable match for the bitch , to improve the breed... Colour should not really be a consideration.
I highly doubt that when people put blue to blue they believe that sire is the best example to put with an already good bitch .. They do it because it's on trend to have blue pups.
If you have a blue you have more chance of skin probs and bad pigmentation , light eyes therefore if you have a good bitch that happens to be blue , why not made her to a black /br dog to improve ( providing the black dog is a good example of the breed in all
other areas) . I don't think it's about scientific evedince . It's like choosing to breed a Stafford that say has bowed legs to another with the same problem and expecting to get pups that conform to the standard.

No its not just because of the amount of staffords in rescue there are health implications. Please read:

https://staffy-bull-terrier.niceboard.com/t17750-how-to-buy-a-dilution-colour-dog

http://www.bluehippos.net/16

http://knightwoodoak-staffies.over-blog.com/pages/Color_Dilution_Alopecia-1291762.html

Increased chance of health problems is the reason..
Shouldnt be done because its pointless.

we dont agree with fawn and fawn mating we also dont agree with white with white mating because breeding these colour together increase the chances of health problems, to breed a good line of blue it having a blue to black mating or black to black mating.

Billybunter wrote:Not so bad if they have been health checked and done correctly its the back yard breeders who do it for money who just want to make a bundle of cash rather than have healthy pups

blue to blue mating is very bad dont matter if both dog been health tasted

peardrop wrote: The french breed club says that in the uk blue pups are killed at birth which is false because blue is the most popular colour at the moment in the uk with the most number of births registered with the kennal club.

they was put down or nurtured pretty enough straight away

You are right that more blues than any other colour were registered last year and the previous couple .... Yet still many BYB's are selling them for higher prices because they are 'rare' ... Surely it's now the reds and black brindled that are rare.

Nosipho wrote:No its not just because of the amount of staffords in rescue there are health implications. Please read:

https://staffy-bull-terrier.niceboard.com/t17750-how-to-buy-a-dilution-colour-dog

http://www.bluehippos.net/16

http://knightwoodoak-staffies.over-blog.com/pages/Color_Dilution_Alopecia-1291762.html

interesting articles

Thanks

......also this:

https://staffy-bull-terrier.niceboard.com/t17716-colour-dilution-alopecia

Doh! I think that was the one I meant to link Caryll. I just started reading and clicking and got carried away!