Look closely – can you tell which of the above pets is alive? If not, then that's the whole point! Enter Perpetual Pet [1], a company that freeze-dries your pet after she passes. Without going into too many morbid details, you can choose to preserve your pet's entire body in a natural state, not just the outer hide (like taxidermy). To get started, your pet is put in a sealed vacuum chamber at a very low temp and, over time, the accumulating frozen moisture is converted into a gaseous state then extracted – taking over six months for larger dogs. Unsurprisingly, the price for this process is not cheap; the service starts at $395 for pets weighing zero to three pounds up to $595 for 10 pounds (with $50 extra for each additional pound). Just when I truly thought I had heard of everything, up popped this company. Oh, and about that question I started with – both Trigger and Tiny [2] are now perpetual pets.

Source [3]