Advocacy Groups
- The Animal Alliance of Philadelphia
This group works for the welfare and control of homeless animals.
- Alley Cat Allies
This group is a national, non-profit clearinghouse of information on strays and advocates trap-neuter-return programs and policies to reduce feral populations.
- ASPCA - American Society for the Prevention of Cruelty to Animals
- North Shore Animal League
- Humane Society of the United States