What do you mean by 'the birds are marked'? Are we talking about a tattoo? Do they have a closed leg band and, if so, does it have a year on it? I'll be honest with you, papers mean nothing. The American Kennel Club (dogs) uses nothing but paper and people have been selling dogs that are not purebred with a pedigree certificate for as long as I can remember because everything is done through papers (easy to forge). With birds, the only thing that is a sure thing is a closed band with a year engraved on it and then only if the laws of the country prohibit selling bands with a different year on them (this is the way it is in USA).
But, if they are 6 or 7 months old, they would be going through their juvenile molt right now, are they? Because the picture did not look as if they were molting...
The other thing is their eyes. They still have greyish eyes but they are already showing all their irises (babies eyes are completely black) and it seems to me that they are already beginning to get a yellow tinge to them - and that doesn't happen until they are, at least, 1.5 years old.
And third but not least is behavior. A handfed baby Senegal is not bonded to another bird and would much rather be with a human than with another bird. And they are not aggressive at all. Quite the contrary, they are VERY cuddly and playful.





