This has to stop. That was private property and if the cop had reasonable cause he should have obtained a warrant and contacted the owner. Property rights mean nothing, laws mean nothing, our country is being destroyed and nobody has the backbone to stop it.
Exigent circumstances. Cops have a long recognized right to enter public property in an emergency such as a fleeing suspect, an observed fire, or in this case a missing child. So they had reason to be in the back yard.
What I don’t get is why the cop didn’t leave, call animal control to capture the dog with the KETCH-ALL tool. Then search the area.