An authorised person—
(a) must seize a dog if the authorised person reasonably suspects—
(i) the dog attacked a person; and
(ii) the attack caused the death of or serious injury to a person; or
(b) may seize a dog if the authorised person reasonably suspects the dog—
(i) attacked a person or an animal and the attack caused—
(A) an injury (other than a serious injury) to the person; or
(B) serious injury to the animal; or
(ii) harassed a person or an animal; or
(iii) is aggressive or menacing.