I had adopted a cat about 2 weeks ago and she has been or seemed somewhat lazy. She would come out to eat for the most part and drink when I fed both cars. Today, however, she did not eat or drink. Later in the day the other cat was following her so I checked and there was a lump that seemed to have come out of nowhere. I mean earlier in the day there was no lump and if there was it was tiny. That night the lump was enormous and her breathing became very heavy. She started keeping her mouth open and looked as if it were harder to breathe each breath. You could tell she was in so much pain. Her breaths became longer and longer from each breath and we pet her until she passed which was only a few minutes. It was very sad and would like to know if anyone has any input at all in the matter. She was very friendly and kind. Very unfortunate the outcome. Thank you.