The phrase "additional animals" is correct and usable in written English.
It can be used when referring to more animals beyond those already mentioned or considered.
Example: "The zoo plans to acquire additional animals to enhance its collection and attract more visitors."
Alternatives: "more animals" or "extra animals".
In addition, 32 additional animals were necessary in order to set an adequate endotoxin dosing protocol (unpublished observations).
Tissues from 2 additional animals were collected as age-matched nonlabor controls.
Three additional animals were serially sampled by amniocentesis through late pregnancy until spontaneous term labor.
Two additional animals from each experimental group were prepared for election microscopy studies.
Additional animals were maintained for 3 weeks after termination of antibody injections to assess rebound growth of tumors.
Additional animals received cortical bone as an isogeneic, biological implant, while chambers of animals without implants served as controls.
That was but one of more than 8,000 animal shipments that arrived here legally over the last year, with untold additional animals slipping by unnoticed.
Three animals received an incomplete lesion (lateral contusion at a mid-thoracic level, ~T8) and three additional animals received a complete spinal cord transection at the same level.
To control for the effect of SPD, additional animals were treated with vehicle (2 ml/kg, 15 μM H2SO4 with pH adjusted to 5.0 using 0.1 mM NaOH).
Bilateral blockade of δ-opioid receptors in the rVLM partially reversed EA's action on systolic, mean and diastolic BPs in four additional animals (Fig. 4).
Ten, approximately four month-old lambs and calves were vaccinated with RVF MP-12 strain; two additional animals per species provided negative control specimens.
