We found our cat Poncho (named after the forum) on the floor, panting heavily and not very responsive. He had relived both his bowels and bladder. We rushed him to the vet hospital at UPEI and they ran a bunch of tests. None are conclusive however his liver an kidney numbers are off the chart. His heart beat is abnormal and he's in a lot of abdominal pain. They are keeping him overnight on IV pain meds and will do another assessment tomorrow. The tests were really inconclusive however they suspect either cancer or advanced liver disease. They hope to have a better idea tomorrow. I'm trying not to think about him as he's been with us since 2010 when he hopped into my wife's car as an injured kitten. I fear we'll have some tough decisions to make tomorrow.
That is very sad. We have had many cats come and go over our married life and we still have a bunch on the acreage (including a new stray black kitten courtesy of the ever efficient cat distribution system) and they do become members of the family. Losing one is just about as tough even with me being an declared insensitive old curmudgeon. I feel for you.