Just came back from the vet. When we took little boy cat in for his vaccinations they noticed a heart murmur that hadn't shown up before. Turns out that he has Hypertrophic Obstructive Cardiomyopathy and he is likely to go into heart failure within a year. Not much can be done. Just unbearably sad. Literally one minute he was our mad little boy and the next we know he will probably die before he is four. He can bring mice into my bed as often as he likes now.