We feed wild birds. Occasionally feral cats have staked out our feeders. Bad strategy, big mistake. De-clawing a cat helps curb their killing as they can't grab prey so easily but not a good thing for cats left outdoors most of the time as it disarms them. House cats let out briefly and not having to defend themselves don't need their claws (your furniture and drapes will thank you.)

Life feeds on life, it is natures way. Life is not a Disney theme park. If you keep a pet that pet will have an impact, a footprint if you will. What do you want more, song birds and such or outside cats? They are incompatible. You might as well wish that apples falling from a tree would float up instead of falling down as to try to get cats and birds to peacefully coexist.

Barn cats are a terrific boon to helping to control rodents without poison which might find its way into the food chain and cause unintended collateral damage. Bird feeding needs to be well away from the barn then.

Birds or outside cats, pick one.

Pat