Do dogs get treated for ticks and fleas before being adopted or is that something the new owner does on their own?

As far I know they handle all of that before you adopt

Hello, our pet adoptions include: - Spay/Neuter surgery - Lifetime registered microchip - Rabies vaccination - First month of flea, tick and heartworm prevention - First round of vaccinations - Lifetime basic training for adopted dogs

Shots and spay/neuter and and any other issues are handled before adoption.

ACS spays/neuters, checks for heartworm and vaccinates your dog, before adoption. In rare cases, spay/neuter has to wait until the dog is healthy enough. In which case, you sign a waiver and can return to ACS or Wellness Spay Neuter clinic for a future s/n at no cost.