3 year rabies shots: In Apil 2008, i Had four cats, two female, 2 male, They were all given a 3-year rabies shot. It made sense at the time. Two of my cats are dead, one of cancer, one of bowl related illness. The other two are hanging on although the other male probably has cancer. His blood tests didn't show anything wrong but he is losing weight. My older cat has developed hyperthyroidism and will probably die of heart failure. Has any had such horrendous results from a vaccine. By the the end of the summer I will have no cats and they all will have died within 18 months.