Dog whistles operate on the principle that dogs can perceive things humans can't.

2 after the L
1 after the S
2 before the B
1 before the I
1 after the E
2 after the K
2 before the A
1 after the H
1 before the L
2 after the H
2 before the L
2 before the B
1 after the K
4 after the S
1 before the A
1 after the U
2 before the W