by Pajarita » Sun Jan 28, 2018 11:26 am
Uhhhh, that doesn't look good at all. It does look like a tumor or an abcess but it's real hard to tell without being there. Have you palpated it? Does it feel squishy or solid? I've seen a couple of budgies with large fatty tumors like that one but I've never seen a cockatoo... But, in any case, I agree with Navre completely. That bird needs to see a good avian vet asap and get a complete physical with blood work, bile acids and a full body XRay because, if it is treatable, it's going to require surgery...
In the meantime, do avoid stressing them out. Put the cage up high and against a wall with a material draped over the back half of the sides [it will make them feel safer] and provide as much variety in the diet as possible [different fruits, greens, veggies, etc] as well as what they have been eating all along -well, unless it's real crap, of course! And keep them extra warm -and this means at least 85 degrees.