Free-ranging canids are typically trapped before drugs are
administered (Kreeger, 1992), although field-darting
occurs in some cases. Box traps, padded-jaw traps, or
offset-jawed foothold traps are typically used. Although
coyotes do not usually fight a trap for long (Kreeger,
1992), other canids may fight against the trap frantically
(especially when approached by humans) and may pull
out of the trap and/or injure themselves. Leg fractures are
common when steel-jawed traps are used to capture red
foxes. Box traps may be used on naïve fox populations,
but are ineffective on many red foxes.