[Bronzy]

>>>What kind of dog has to be tied up<<<

Perhaps a house training in progress. My late dog’s trainer suggested that I tie my dog to the door knob while I was gone because they don’t poop where they sleep. After a few days confined, my dog no longer pooped in the house.

[Altariel]

Yes, that is possible, either house training or an attempt to keep the dog from chewing on the owner’s possessions.

Or perhaps both.

[Alaska Wolf]

My late dog’s trainer suggested that I tie my dog to the door knob while I was gone

STUPID! Didn't your dog's trainer ever hear of a kennel?