Are the animals of different types?
No, all the animals are horses.
     src        edge_attr  dst
0      0           behind    1
1      1      in front of    0
2      1   to the left of   12
3      1   to the left of    4
4      1   to the left of   21
..   ...              ...  ...
136   23  to the right of   10
137   23  to the right of    3
138   23  to the right of   11
139   23  to the right of   13
140   23          wearing    9

[141 rows x 3 columns]