The Demise of Pets: An Omen?

I am generally not superstitious, but when things happen inadvertently, following a specific "sign", I welcome my belief in omens.

My siblings and I are such animal lovers that we have made our own makeshift zoo back home. Over a period of 10 years, we must have had 3 dozens of small pets (including babies), 6 dogs, a cat, turtles, fishes and plenty of birds. We take care of our pets like they are family, feeding them healthy, grooming them, giving them attention and toys, and bringing them to the vet. The quality of life our pets had reflected our own (especially in relationships).

One time, I gave my ex a beautiful Boston Terrier named Heather - and she was spoiled to death during the good parts of our relationship. When we broke up, I doubt she was even given baths, proper food and taken to the vet. I really wish I had her back.

Over the years, when our pets die without any reason, the omen-believing me is left perplexed - thinking that it's not old age or poor health that made it happen. The demise of a pet becomes the sign of something about to happen.

Let's take it back years ago when my 2 sharks died. They literally were babies when I got them (3 inches long) and grew up to 2 ft. in a few years. One day, our househelp cleaned their aquarium and put tap water back (she was ignorant, it was supposed to be deep well water). Within a day, my sharks died :( And immediately after that, I decided to break up with my ex of 3.5 years.

Just a little less than a month ago, my sister's English bulldog died of a heart attack. She just weakened while she was taken out for a walk. Weeks after... well, let us put is this way - something similar happened.

Is it an omen when pets die? And when omens appear, do you just sit, wait and let the universe take over? Or do you consciously make something happen to justify it's an "omen"?