Cleistocactus strausii
As a houseplant, the Silver Torch cactus is an easy to take care of so long as over-watering is avoided. To naturally simulate the porous effects of the sand in its native habitat, it's important to ensure that excess water will not pool in the soil, causing the roots to become water logged.
This plant’s native habitat does not have winter, but when temperatures drop to the low twenties, it can exhibit signs of tip frost. 
The Silver Torch cactus is most susceptible to 
mealybugs 
and spider mite.
Cactus cat
Cactus cats were social animals, often mating for life. They were said to live about 20 to 30 years. Before and during mating season, the male felines would break open a large Saguaro cactus and let the smell attract females to the location. Often enough, two females would be attracted to the scent, and fight. The fight usually ended in one of them getting brutally spiked or stabbed to death. The winning female would then meet with the male and drink the cactus juice. The pair would get drunk and then produce a litter of kittens within the next few weeks. The kittens were born blind at birth with no spikes.