Hey there! I've had a pet Ringneck dove for a little over a few months now. I noticed last week she has a little lump on the inside of her joint on the right leg, and that leg tends to be reluctant in opening/gripping. The rear-most toe has always been a tad lifted, as well. Today I noticed her having some troubles with the foot, when I pick her up, she stands on that leg, with the toes curled inwards into a "fist" and the hock, the joint of the leg, has that lumpy, almost swollen appearance. Arthritis? Not sure, Thank you, folks. Cheers!