If you are referring to the rehoming fee requested by some people when gining away a pet that is a one time only fee. If they request more than about $50.00 that is not a rehoming fee, you are purchasing the animal

typically just once when you aquire the animal

no if you check at a petstore i am sure you will find one . thanks

Dogs Trust is a canine rehoming/rescue centre which is funded entirely by donations.

try the vets notice board on benbecular, there were lots of dogs needing homes on it when we were there,