Cattle

Cattle were domesticated mammals native to Earth. Females were called cows. (DW: Image of the Fendahl) Clyde Langer once succinctly said that "cows eat grass, and they make milk and they go moooo . .  . [and] they also make steak." (SJA: Sky)

Encounters with cows
The Doctor and his companions and acquaintances occasionally dealt with cattle. The Eighth Doctor, Charley, and C'rizz encountered cows in the Garden of Curiosities. (BFA: Caerdroia) The Fourth Doctor once landed the TARDIS amongst a herd of cattle and facetiously asked them if they had a time scanner, to no avail. (DW: Image of the Fendahl) The Sixth Doctor and Peri witnessed the heavens open up to dump cows on the beaches of Ostend, Belgium. (BFA: Year of the Pig) When she was briefly a vampire, Nyssa feasted on the blood of a cow in the fields outside Manchester in the 1990s. (MA: Goth Opera)

Bernice Summerfield once experienced a freak time anomaly in which leather shoes were turned back into cows. However, the time anomaly only restored the cows a point shortly before they were turned into leather. Thus, the floors of the Gigamarket were littered with dead cows. (BFBS: The Greatest Shop in the Galaxy)

Dr Scotus, a veterinarian working near Cardiff, once examined a cow that had begun eating other cows, because it had been affected by an alien tapeworm which had come through the rift. (TWN: Slow Decay)

Even the Doctor's enemies used cows. Zygons once used body-print technology to take the form of cows as they were allowed to roam freely. As was necessary for the proper operation of body-print technology, the Zygons stored the real cows in their ship. (NSA: Sting of the Zygons)

Once humanity became a space-faring race, they took cows with them to the stars. As Earth's influence spread, cattle were shipped off the planet across the galaxy, such as Jadea. (EDA: Placebo Effect) Humans also brought cattle to Sarath. (PDA: City at World's End)