If it feels like a lump of fat it is probably that. Feed Less seed. If it is hard like a pea it could be a cyst (like an ingrown hair but a feather). If the bird I'd very fat it could even be the liver. You'd see other signs
Jan 30, 2009
Amazon with lump on chest by: Tracie
Hi Tom, my thoughts are that you should take the bird to an avian vet to see what it is. I have never heard of a "normal lump" so I suspect there is something that needs to be attended to.