| Name | Character | Episodes |
|---|---|---|
| John DiMaggio | Dog Catcher (voice) | 8 |
| Tracy Morgan | Woof | 8 |
| Jeff Ross | Buddy | 8 |
| Dean Edwards | Various Celebrities (voice) | 8 |
| Maria Bamford | 2 | |
| Jason Alexander | 1 | |
| Larry the Cable Guy | 1 | |
| Dwight Schultz | 1 | |
| Ian James Corlett | 1 | |
| David Kaye | 1 | |
| Tony Jay | 1 | |
| Ziggy Marley | 1 | |
| Andrea Libman | 1 | |
| Billy Connolly | 1 | |
| Chiara Zanni | 1 | |
| Corey Burton | 1 | |
| Michael Donovan | 1 |