My most dear, most kind, most precious, wish-fulfilling one,
I heard you wanted very much to come here but you have a cat that is twenty-one years old and is very sick, so you couldn’t come. I understand, that’s very good taking care of the cat.
It’s good to recite Maitreya Buddha mantra in the cat’s ear. That causes the cat to never be reborn in the lower realms, to have a higher rebirth and to meet the Dharma. Also recite Medicine Buddha mantra, Chenrezig Buddha mantra, Milarepa Buddha mantra and Lotus Pinnacle of Amoghapasha mantra: OM PÄDMO USHNISHA VIMALE HUM PHAT. Recite these mantras several times each day. [You can find these mantras here: Powerful Mantras at the Time of Death.]
Also recite the Three Principal Aspects of the Path and different lamrim prayers. The most important thing is to take the cat around holy objects. If you can, make an altar on a table, and put many holy objects on the table, piled up—tsatsas, buddha statues, pictures and texts, then take the cat around, on the same level as the altar. Put pictures of buddhas, and statues and tsatsas, as many as possible, then go around that.
However many holy objects are there—one hundred or one thousand—each time the cat goes around the holy objects, it creates that many causes of enlightenment. It is good to have many tsatsas there and to take the cat around them as much as you can before he dies, otherwise there is nothing much you can do.
Here is a powa pill. When the cat dies, put it on his crown with butter and honey.
It is very kind of you to take care of this cat for twenty-one years. Perhaps the cat could also be a recent family member, for example, if your father or mother died, or sometimes it could be your wife from a past life. It could be anything.
Please continue to make your life most meaningful for every sentient being with bodhicitta. Thank you very much. I hope to see you soon.
With much love and prayers ...