The phrase "to dislodge the object" means to remove or force something out of its place or position, typically by using some kind of force or effort. Full definition
If this doesn't dislodge the object and open your pet's airway, you should be well on your way to your veterinarian or animal E.R. (bluebuffalo.com)
On top of that, the air force generated by a toddler's cough is less than an adult's, thus making it less effective in dislodging an object from the throat if something does get caught in there. (howtoadult.com)
Don't try to use your fingers to dislodge the object because this could risk pushing it further into his airway. (health-and-parenting.com)