The heads of zakat are very clear and they need to be invested on human beings in need. I don’t think spending Zakat on Animal Shelters would be an appropriate allocation of Zakat Fund. Please refer to the following video to understand heads of Zakat.

We will try to take insight from Mr. Hassan ilyas as well.

https://youtu.be/8aa5-qwWKr0

Response by Hassan ilyas Sahab:

https://soundcloud.com/ask-ghamidi/0042-can-zakat-be-used-to-support-an-animal-shelter/s-q2w10VJEt6n