Cats = 75% of 40 = \( \frac{3}{4} \times 40 = 30 \).
Dogs = 15% of 40 = 0.15 × 40 = 6.
Rabbits = 40 − 30 − 6 = 4.

• Rabbits + Dogs = 4 + 6 = 10

Final Answer: 10