My cat Sadie has cancer under her tummy, it began as a bubble, last month it broke open , vet confirmed it was cancer, its the size of my palm , she is still eating, drinking, carrying on as if she was ok, just licks it alot, and it bleeds a little ,,is there anything I can cover it with , until she tells me its time for me to , well you know.. or am I just prolong it her , advice please.