Copy-paste suggestions:

1. Contact Animal Control, leave them a voicemail with your pet's information and your contact info as well as detailed information on location & timing
2. Contact Worcester Animal Rescue League with the same, they are where the ACO's bring lost pets
3. For dogs: Submit a missing dog report to Missing Dogs Massachusetts, they are the biggest in the state and very active in helping people reunite by helping track sightings
4. Additionally it might be helpful to notify other area rescues like Second Chance Animal Services and Broken Tail Rescue, Inc. Or lost pet list Facebook pages like Worcester, MA - Lost & Found Pets, Worcester, MA - Lost Dogs, Cats & Pets, Lost and found pets of Mass, Lost and Found Pets of Massachusetts, Massachusetts - Lost and Found Dogs & Cats,
5. Post on Nextdoor, local Facebook groups, and Friends of Worcester Dog Parks (any lost pets welcome)
6. Contact your veterinarian and any veterinarian you can find in the neighborhood and nearby-ish to let them know in case they get brought in. If you get voicemail include how to identify them and how to contact you.
7. If they are microchipped, contact the microchip company and make sure your info is up to date with them.
8. Make sure to keep track of all people you contact, places you post, so you can update folks to know they're found or any changes in sightings. On Facebook the easiest way to do this is to make a public facebook post on your profile with all the important information and share that to groups instead of making individual posts.

I hope they find their way home soon!