A man with a pair of dogs, The Luttrell Psalter (British Library MS Add. 42130, fol. 64v), c. 1325-1335
The Romance of Alexander (Bodl. 264), 1338-1344: Several pictures of dogs throughout the manuscript, but fol. 77v has an especially useful picture of leashes
Several illustrations from the hunting-book of Gaston Phoebus; this link in particular goes to BNF Fr. 616 (beginning of the 15th century), but you can also use Mandragore for BNF Fr. 1291 (c. 1445-1450) and BNF Fr. 617 (beginning of the 16th century), or see Morgan Library M. 1044, fol. 45 (c. 1410).
Parsley (fol. 31v),
mandrake (fol. 37),
gazelle (fol. 69v),
hare (fol. 70), and
hunting (fol. 93),
Tacuinum Sanitatis (BNF Latin 9333), 15th century
Tristan and the shepherds, Tristan de Léonois (BNF Fr. 97, fol. 136v), 1st quarter of the 15th century