Cambridge : Règlement no 171-13, art. 8.1(a) — Animal Control By-law

It is not likely to harm any animal;

• (b) Every animal therein may be readily observed unless the natural habits of the animal otherwise require,
• (c) Any animal cannot readily escape therefrom,
• (d) It minimizes as nearly as possible the transfer of pathogenic agents;
• (e) It may be readily sanitized; and
• (f) Every animal in the cage, tank or pen may comfortably:
• (i) Extend its legs to their full extent,
• (ii) Stand, sit and lie down in a fully extended position, and
• (iii) Be provided with adequate space for exercise purposes.