HELP - my African Grey’s feathers break!

[karenm0]

PLEASE HELP!
Our 17 yo African Grey, Sam, has very poor feather strength. More than a decade ago, after Sam was in full feather, we had his wings trimmed by a vet tech who “over groomed”. Since then, we have not been able to get Sam’s feathers to grow out. They BREAK, typically when they are large pin-feathers. Sam does NOT pluck his feathers, but he doesn’t groom particularly well either. Before her sudden death a year ago, our Amazon was fully flighted, and we would like Sam to have the same advantage. But we’ve been trying for years, and have had no luck. Our (very capable avian vet) has simply said that Sam has “poor feather strength”. Has anyone out there had the same issue? Does anyone out there have any suggestions for us?
We’d appreciate any advice you can offer!

[Pajarita]

I already answered on your other post.