9 Animal Shelters and Charities You Can Support in Houston Help out dogs, cats, rabbits, birds, mini pigs, and more. By Gwendolyn Knapp 5/13/2021 at 6:00am Published in the Spring 2021 issue of Houstonia Whether youâre looking to adopt a mini pig, foster a kitten, or give cash to the birds and possums, these Houston-based nonprofitsâwhich double as superheroes for rescues, pets-to-be, wildlife, real-life dog heroes, and moreâare a good place to start. Houston Pets Alive! The nonprofit spared 3,572 cats and dogs from euthanasia in 2020 and found 3,815 forever homes for cats and dogs, thanks to the contributions of its many supporters. But donationsâkitty litter, food, toysâare always needed, at 2800 Antoine Dr, Suite 2854.