Home › Top 5 Pet Shops in San Marcos, California Find best Pet Shops in San Marcos, California, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Bell Rock Growers Inc US, San Marcos, CA 920693700 N Twin Oaks Valley Rd PawSteps, Inc. US, San Marcos, CA 92069132 N Las Posas Rd Petco - San Marcos (CA 92078) US, San Marcos, CA 92078141 S Las Posas Rd Just Food For Dogs - San Marcos (CA 92078) US, San Marcos, CA 92078Inside PetCoach, 141 S Las Posas Rd Talia Dog Boutique US, San Marcos, CA 92078310 S Twin Oaks Valley Rd