I had to bring my cat in for his yearly physical last night. All is fine except for the fact that he was a total grump. He was adopted from my vet, so she ignored all his noise and went about examining him and updating his rabies vaccine despite his mouth being wide open. The only thing I wanted to talk to her about was the fact that he has changed since my other cat died. He's not depressed or anything, he's just not so much of a punk like he used to be. She explained to me that while people can try to understand animal dynamics and how their relationships work with other animals, there is a good chance that nobody will ever truly understand them. She saw changes in her own animals after experiencing a number of "cluster deaths" amongst her own pets. One of her cats that she refers to as her "umbilical cord cat" turned into a beast after her black lab and one of her other cats died, which he didn't like anyway. He didn't mind the dog so much, but Mistofflees was a cat that did things her own way to say the least. She then explained that since my cat is 4, there is a good chance that maturity kicked in around the same time, hence the change in his behavior, but she doesn't eliminate the possibility that he could have changed when my other cat died. People say that cats mature around 6 months of age, but she feels that maturity doesn't really kick in until they are atleast 3. I agree with her. For those of you that have multi-pet households, have you witnessed a change in your pets after the loss of another pet in the household?