[anti-ambush dogs] explosive detection dogs [cadaver dogs] immigration control [anti-terrorist dogs] 
tracking dogs
g e n e r a l p u r p o s e
p o l i c e d o g s
s e c u r i t y g u a r d d o g s
t r a c k i n g d o g s
a r e a c l e a r a n c e d o g s
v i s u a l d e t e r r e n t