PETCO 10060 Baltimore National Pike, Ellicott City, MD21042 Petco is definitely, "Where the pets go," for quality products and services for all animals. Petco offers products for…More cats, dogs, fish, rodents, birds, reptiles and much more. The store is sectioned off by animal making it easy to find any product. Petco also offers grooming services for cats and dogs. Cats can be adopted and fresh and saltwater fish can be purchased here.