The large plexidor dog door has an opening of 11 3 4 x 16 inches and it is intended for dogs up to 100 pounds.
What size dog door do i need for a golden retriever.
Tall dog if you have a very tall dog with long legs with no health issues they might be able to easily step over a height of 7 10 for their pet door.
Common breeds are labradors collies german shepherds dobermans and golden retrievers.
Dogs up to 40 pounds such as poodles corgis dachshunds beagles pekingese shelties schnauzers cocker spaniels and many terriers need a medium plexidor dog door.
Dogs up to 100 pounds such as labradors german shepherds golden retrievers boxers collies setters bulldogs pointers and dobermans require a large plexidor dog door.
Your pet door flap size needs to be at least 16 tall and 8 wide so you will require a tall pet door but not too wide.
The large size is big enough for dogs of up to 125 lbs which should be more than big enough for your golden retriever.