I have been to the one in Bayamon and I felt bad for the animals. Their cages were clean but barren. Just a concrete floor and chain link fencing. The poor things looked so bored and sad.
Having lived there for 3 years I saw appalling animal abuse. There are so many dead dogs on the road it is disgusting. I rescued a dog, a horse, and 2 cats and brought them all home with me when we moved back.
As far as I remember, Puerto Rico hasn’t had an effective animal-welfare organization to take on the situations you refer to. And, unfortunately, zoos have had a sorry track record in the island.