The ship's cat has been a common feature on many trading, exploration, and naval ships dating to ancient times.
 Cats have been carried on ships for many reasons, most importantly to catch mice and rats.
 These vermin aboard a ship can cause damage to ropes, woodwork, and more recently, electrical wiring.
 Also, rodents threaten ships' stores, devour crews' foodstuff, and could cause economic damage to ships' cargo such as grain.
 They are also a source of disease, which is dangerous for ships that are at sea for long periods of time.
 Notably, rat fleas are carriers of plague, and rats on ships were believed to be a main spreader of the Black Death.
Sir Edward Richard George Heath, (9 July 1916 – 17 July 2005), better known as Ted Heath, was a British politician who served as Prime Minister of the United Kingdom from 1970 to 1974 and Leader of the Conservative Party from 1965 to 1975.
 He was a strong supporter of the European Communities (EC), and after winning the decisive vote in the House of Commons by 336 to 244, he led the negotiations that culminated in Britain's entry into the EC on 1 January 1973.
 It was, says biographer John Campbell, "Heath's finest hour".
 Although he planned to be an innovator as Prime Minister, his government foundered on economic difficulties, including high inflation and major strikes.
 He became an embittered opponent of Margaret Thatcher, who supplanted him as party leader in 1975.
Wilberforce was a cat who lived at 10 Downing Street between 1973 and 1986 and served under four British Prime Ministers: Edward Heath, Harold Wilson, Jim Callaghan and Margaret Thatcher.
 His chief function was to catch mice, in which role he was the successor to Peta.
 In life he had been referred to as "the best mouser in Britain", as befitted his role.
Sir Edward Richard Henry, 1st Baronet, (26 July 1850 – 19 February 1931) was the Commissioner of Police of the Metropolis (head of the Metropolitan Police of London) from 1903 to 1918.
The title of Baron Montagu of Boughton was first created in 1621, in the Peerage of England, for Sir Edward Montagu, eldest son of Sir Edward Montagu of Boughton and grandson of another Sir Edward Montagu who had been Lord Chief Justice during the reign of Henry VIII.
 He was also the brother of Henry Montagu, later created Earl of Manchester, and of Sidney Montagu, ancestor of the Earls of Sandwich.
The Fitton Baronetcy, of Gawsworth in the County of Chester, was a title in the Baronetage of England.
 It was created on 2 October 1617 by James I for Edward Fitton, of Gawsworth Hall, Gawsworth, Cheshire.
 The Fitton family were settled in Gawsworth from about the 13th century.
 The first Baronet's ancestors included Sir Edward Fitton (1500–1553), High Sheriff of Cheshire in 1544 and Sir Edward Fitton (1527–1579), Treasurer of Ireland and President of Connaught.
 His father Sir Edward Fitton (1548–1606) was an unsuccessful colonist of Munster.
 His sister Mary Fitton was Maid of Honour to Elizabeth I.
MouseHunt is a Facebook game in which players, referred to as hunters, catch mice with a variety of traps to earn experience points and virtual gold through passive gameplay.
 From time to time, the developers add new locations and mice as well as sponsor periodic giveaways and tournaments.
 "MouseHunt" was developed by HitGrab, Inc. under the direction of Bryan Freeman and Joel Augé, and was released to a select group of participants for beta testing in early 2007.
 On 7 March 2008, "MouseHunt" was officially released to the general public.
 Just nine months later, MouseHunt earned its creators a $250,000 development grant from Facebook.
 In 2011, it was shortlisted as a Top Game with a user base of 50,000 to 100,000 users.
The Guldeford Baronetcy, of Hempsted Place in the County of Kent, was a title in the Baronetage of England.
 It was created on 4 February 1686 for Robert Guldeford.
 The title became extinct on his death in circa 1740.
 The Guldeford (or Guildford) family descended from Sir John Guldeford (d. 1493), Comptroller of the Household during the reign of King Edward IV.
 After supporting the Earl of Richmond (later Henry VII), Sir John and his son, Sir Richard Guildford, were attainted by Parliament.
 However, they were restored to favour after the accession of Henry in 1485.
 Sir Richard gained prominence under Henry and notably served as Master of the Ordnance.
 By his first wife Sir Richard was the father of Sir Edward Guildford, Lord Warden of the Cinque Ports and Master of the Ordnance, whose daughter Jane Guildford married John Dudley, 1st Duke of Northumberland.
 Sir Richard Guildford's second son by his first wife, George Guildford, of Hempstead Place, Kent, was the father of Sir John Guldford, High Sheriff of Kent during the reign of Edward VI.
 Sir John's son Sir Thomas Guldford entertained Elizabeth I in 1575.
 Sir Thomas was the great-great-grandfather of Sir Robert Guldford, 1st Baronet.
Thomas George Heath (August 3, 1913 – February 26, 1967) was an American catcher and scout in Major League Baseball and a manager in minor league baseball.
 He played in parts of three seasons in the Majors between 1935 and 1938 , all for the St. Louis Browns.
 Heath stood 5 ft tall and weighed 185 lb during his playing days.
A mousetrap is a specialised type of animal trap designed primarily to catch mice; however, it may also (intentionally or unintentionally) trap other small animals.
 Mousetraps are usually set in an indoor location where there is a suspected infestation of rodents. Larger traps are designed to catch other species of animals; such as rats, squirrels, other small rodents, or other animals.

Question: What kind of animal served under Sir Edward Richard George Heath to catch mice?
Answer: cat