With 311 registered cria, Dr. Doolittle regularly appeared in the Llama Life list of legendary sires. Kay Sharpnack wrote this about Dr. Doolittle in an article that appeared in Llama Life 31

The most famous of (Doolittle, Sitting Bull, and Zorro PL) was Dr. Doolittle, born June 8, 1975, who died February 14, 1983. Dr. Doolittle came in utero from the Catskill Game Farm and was, therefore, bred by Roland Lindemann. We never knew who his sire was; Mr. Lindemann called most of his male breeders “Harold,” the name of his grounds keeper. This was an in-house joke. Fluffy, his dam was very large, excellent boned, heavy wooled (no facial or ear wool), and a heavy milker who produced 10 babies for us. She was all white. Doolittle looked white but was what is now called a very dilute appaloosa. He had “Dagwood Bumstead” sprouts of wool over his eyes, on top of his head, and fringe on his ears. The most prepotent sire of all and kingpin of the breed, Doolittle put wool on all of his 311 offspring.