These domestic dwarfs have probably had a difficult time with this winter's cold weather. Meant as pets, they've had their protective outer coat bred away. People bring salad leftovers to feed them; they are community pets of convenience. At Minoru Park, other hazards rabbits may face include dogs, owls and Red-tailed Hawks.
There's another introduced mammal too, the Eastern Grey Squirrel, which is predisposed to living among the large trees. Notice the nice, thick winter coat, the result of having evolved in eastern North America. Cold? What cold? Not a pet by any means. Pest, perhaps.
The smaller hawks that typically do well in city parks show up here, with the ample food supply: occasionally the mammals above, but more frequently the abundant bird-life (e.g., introduced pigeons and starlings) drawn to wherever people feed birds. It's a strange, mangled ecology, and Cooper's Hawks make the most of it.