Poor Spark !
Could there be something in his diet ( I know how excellently you feed your feathered loved ones) that is triggering these tumors ?
doubtful, classy - we went over everything with a fine-tooth comb. consensus at ncsu now seems to be it's genetic
when i first got him his cholesterol level was high but that was reduced to normal levels before his last surgery. hopes were high then but as you can see the tumors are back in full force. granted it took 3 yrs this time compared to 1 year from his first surgery with me to the one at ncsu
