Since you don't get wild boar in the UK, it stands to reason there is no name for them (not that I can find, anyway).


De 6 mois à un an, le sanglier est surnommé "BETE ROUSSE" à cause de la couleur de son poil; de un à deux ans, "BETE DE COMPAGNIE". ...
www.saveursdumonde.net/ency_6/gibier/sanglier.htm

BETE ROUSSE (DE 6 A 12 MOIS). généalogie du sanglier, généalogie du sanglier ... Chez la bête rousse les pinces des sabots sont plus pointues que chez les ...
www.jyrousseau.com/charte.htm

As a boar matures (12 months plus), he could be used on two sows per week ...
www.wappa.com.au/releases/Basic Pig Husbandry - The Boar06....

Mature boars over 12 months can service two times a day, but no more than 7 times a week. If you wean sows in groups, you need one young boar per sow or one ...
www.aces.edu/pubs/docs/A/ANR-0683/anr683six.html

Decrease the ratio to 4 to 6 sows for each young boar (less than one year of age) ... that has farrowed at least one litter or has reached 12 months of age. ...
www.vetmed.ucdavis.edu/vetext/INF-SW_CarePrax.html

RAGOT ou BETE DE COMPAGNIE. Le mâ1e, âgé de 2 à 3 ans est plus lourd que la femelle. Les empreintes du sanglier mâle sont caractérisées par la marque des ...
www.jyrousseau.com/charte.htm

BETE ROUSSE, autrefois LOUP ou RENARD, auj., JEUNE SANGLIER DE SIX A DOUZE MOIs, qui a perdu sa livrée de marcassin. BETE DE COMPAGNIE, SANGLIER D'UN A DEUX ...
www.patrimoine-de-france.org/mots/mots-acade-9-4451.html


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Note added at 52 mins (2006-12-11 00:54:03 GMT)
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Or use the French as this apparent expert suggests:

B O A R S A N D B O A R H U N T I N G .
by dr. g. archie stockwell, f. z. s.
[...]
FRENCH NOMENCLATURE IS GENERALLY IN VOGUE AMONG SPORTSMEN TO DESIGNATE THE AGE, GROWTH AND CHARACTERISTICS OF WILD SWINE. Thus sucklings, wearing a livery of two shades of brown longitudinally striped upon a ground of white and fawn, are marcassins, or “boarlings.” After six months, when the ery, they become change their liv- BETES ROUSSES; “Little red beasts,” and when a year old are BETES DE COMPAGNIE, going in troops. Pigs, two years old, are ragot; twelve months later, sanglier a son tiers an, lit- erally boars that “scratch themselves,” and with the fourth year are quartern- niers. Subsequently the titles of grand sanglier, “big boar;” vieux sanglier, “old boar,” and vielermite, “old hermit,” obtain. Also a boar is farrowe when he has obtained his full complement of teeth, and pigaches, an abbreviation of pieds guaches, when marked by a twisted and crescentric hoof or a toe longer than its fellows. From the time a boar is ragot or sanglier, he is always solitary; but the sows and boarlings, along with bêtes rousses, and bêtes de compagnie, for nine months of the year associate in herds for mutual protection.
http://209.85.129.104/search?q=cache:NO5NzMJPPf4J:www.aafla....