Because it was depressing to see the animals kept in enclosures that are far too small. The lions and bears, for example, were showing clear signs of stress and boredom from being poorly kept in captivity. The animals were continually pacing up and down... up and down... up and down... You get the idea.
Why then have the keepers not included props and toys to promote play and exercise? These animals need an outlet to expand their energy on. Without such an outlet, they will deteriorate mentally and physiologically.
An African Wild Dog stands still like this for about 5 minutes while another paces up and down by his side
Bears enjoy scratching for food hidden in boxes. Lions enjoy keeping a look out from a high perch. It would benefit the animals greatly if such equipment were incorporated into their enclosures which need to be made larger anyway.
Many of the animals were also looking very thin. This seems to me to be another sign of stress. Hip and shoulder bones could be seen sticking out from fur of all colours and patterns. It was truly a depressing sight.
He suddenly stops circling and freezes in this position for about 2 minutes. Note the hollowness in his belly and the sharp protrusion of bone in his shoulder
The two species that appeared to be comfortable in Melbourne Zoo were the lizards and snakes. They were kept in enclosures that were warmed well with numerous heat lamps. However, it must be noted that most of the lizards and snakes in the reptilian exhibit were young (evident from their small sizes). I could not help but wonder why this was the case. Could this be due to a high death rate in the zoo's reptilian population? Maybe. Maybe not. But it is an unfortunate possibility.
Finally, I must say that I found Melbourne Zoo to have too many empty exhibits and enclosures.
While this isn't too big of a deal, it did add to the overall sense of disappointment.