I have done this . It makes a genetic mess . You can not always tell which color you have . You can get birds that are both Lav and blue . It does not make a lighter colored bird when they are both . That rumor was around for awhile . I got some lavender with ink spots like blues can have . That...
I have 2 lavender Orp pullets that have started to lay . Very poor layers so far . I get a few eggs then nothing for a week or so . Hope warmer weather and longer days help .
I think they are not in the standard yet . So if that is so then best of variety or best AOV = any other variety is as high as they can place . Body type is the same as any Orpington . Color is the only difference .
Orpingtons in my experience are recessive white . So yes it counts as a white Orpington . As far as expecting them to carry this no but then it depends on the breeding. It is not uncommon to cross certain colors to gain a benefit . Vigor , type , size are all possible reasons .
Yes they have a white spot on their head . The barring gene does that. Can be sexed at hatch like barred or cuckoo in any breed. Males with 2 barring genes have a larger head spot. Females can only have 1 barring gene.
A single copy of lavender behaves like black. That is to say a splash over lavender = 100% blue. They will carry 1 gene of recessive lavender. Blue over lavender = 50/50 blue and black carrying 1 copy of recessive lavender. It is not a good idea to mix blue and lavender. It can be hard to tell...
Cuckoo is barring on a fast feather growth. Less distinct than barring. This is a orpington project color for me. I see someone selling lavender cuckoo imported English bloodline on eBay. The rooster looked lavender but the hen did not look cuckoo.
Here is my start of lavender cuckoo. Last year hatched. Winter was hard on his comb. I have some eggs incubating from him and some lavender hens. I have a source lined up for some English blacks to improve type I know I have a long way to go.