Petco in Santee combines pet retail, grooming, and on-site veterinary care into a single Mission Gorge Road campus stocking nutrition-focused product lines across dog, cat, fish, reptile, bird, and small-animal departments. The Vetco Total Care hospital handles wellness exams, vaccination protocols, dental procedures, and diagnostic workups under licensed DVMs, reinforcing a veterinary network along Mission Gorge Road that extends east to Jamacha Pet Vets near Mission Gorge Road and Mast Boulevard. Founded in 1965, the Petco brand now operates over 1,500 locations nationwide, though this Santee store tailors its aquatics inventory, seasonal adoption events, and community programming to East County demand. Group and private dog-training classes use positive-reinforcement techniques inside the retail environment to build real-world stimulus exposure from puppy basics through advanced recall work. That structured socialization approach pairs with overnight and extended-stay accommodations at Furry Friends Resort on Cuyamaca Street for owners managing training-and-boarding schedules simultaneously. The freshwater aquatics section maintains over 100 species in individual filtration systems with species-matched pH, temperature, and salinity parameters across both saltwater reef and freshwater community displays.