The dog underneath the bird in the decorated initial on folio 19r is the first of two dogs in Plimpton MS 034; the second is on folio 8v. This page considers the possible meanings of these dogs, drawing again from the literature on medieval bestiaries.

Although it is not entirely clear, I have identified this latter image as a dog due to its body shape as well as the similarity of its front paws to the dog on folio 19r. Clearly, its head is less dog-like than the figure on folio 19r, but the combination of the long snout and curved body with thin hips suggests that it is at the very least a member of the dog family.