The other type of cacti are jungle cacti, and they do need humidity. These plants are more succulent-looking, and lack real spines, similar to 'Christmas' cactus. If this is the type you have, they like a bit more water, and during spring and summer, water plentifully to keep the potting mixture thoroughly moist.
There are about 3-4 million animaks euthanized each year by shelters. There actually are about 4-6 million animals euthanized in shelters in America each year. The above are just estimates. Shelters don't always keep accurate records, and no thorough surveys have been done. No one knows the real numbers.
Fifty thousand dogs per year, including at least 34,250 pit bulls, attack other animals, according to ANIMALS 24-7 analysis of dog attack data from 2013-2014. Of the 82,000 animal victims per year, 59,000 die; 23,000 survive their injuries. Among the dead are 15,500 dogs, 95% of them attacked by pit bulls, and 6,000 hooved animals, 93% of them attacked by pit bulls.