I enjoy volunteering at our local animal shelter. we take care of strays, sick and abandoned dog and cats.
That would be hard for me, I would love helping them but hate seeing them leave. Do you neuter them?
That is one of the processes done here. Another familiar term for 'animal shelter' is also pound. 
Our community does not have a shelter or animal control so I try to trap the cats and take them to the University for their fix and release program.
That is interesting. Some shelters also take in sick tropical animals.
That is something I didn't know, I wonder what kinds they get in , they must have to learn so much about the different species.
Yes, I imagine their capacity is limited as to the jurisdiction regulated within the state. 
Right, I feel so badly about animals being put down. I wish people would be more responsible owners.
There are many typeshelters, but being responsible would eliminate the need to kill to begin with.