7. Stress-related health issues
Cats often react to stress such as a loss by exhibiting behavior like over-grooming. The stress of grief can weaken the immune system and leave the cat more susceptible to respiratory infections or other illnesses. Stress also leads to vomiting, diarrhea or constipation, and cystitis (swelling or infection of the bladder and urinary tract).
After a major loss, your feline friend needs your support and comfort just as much as you need his. Spend time with him sitting together and letting him know that you miss his friend, too. Keep your routine as consistent as possible so that your cat has some stability in his life. The length of your cat’s bereavement will depend on his innate personality, the closeness of the bond between the deceased and the survivor, and the supportiveness of his environment.