Justme2, so sorry for your loss. One dumb question how many of the cats were male. We just lost 2 unrelated cats within 9 months of each other and both were male neutered cats and both saw the vet regularly. One we had inherited from my sister when she passed away. His name was Petey aka Sir Petersworth, he was about 9-10 years oldhe was a Scottish Fold , got sick quick suddenly and took him to the vet and they diagnosed him with kidney cancer and basically said ther was nothing they could do, and had to have him put down. Then our sons cat Zero aka Zman approx 6-7 years old he was your typical black panther cat with jade green eyes, suddenly started acting sick on a Monday, took him to the vets on Tuesday and they diagnosed him with a urinary tract blockage and kept him and were treating him and called us the next morning and said his vitals had dropped drastically, and he was dying and his organs were shutting down. Wife and i cried like babies as he passed away in or arms. At that point in time I said we will never own another male cat.