Really just grounhogs. Not a separate species.
All types of animals dig holes. According to where you live, you may have groundhogs, gophers, moles, and chipmunks, just to name a few. If you have any of these and have dogs, the dogs may be trying to dig them out.
Groundhogs protect themselves by running and hiding in their holes. Groundhogs have lookouts that make alarm calls if predators are seen, the lookouts use different calls for flying predators and ground predators. Groundhogs dig tunnels in the earth specifically for this purpose.
They like to eat what's inside and sometimes they end up eating dirt as well.
Rabbits dig the holes that is why they have claws.....
They go underground to hibernate in Northern climes.In the South, they may emerge on mild winter days. They r mammals
There are many animals that dig holes underground. Frogs dig holes. Moles also dig holes and rabbits can as well. Animals will do this for protection, and to stay cool.
get a shovel and dig in some dirt
not only golden retrievers dig holes. lots of dogs dig holes it's just something they naturally do. sometimes it's because they are bored.
twice as long as it takes to dig two holes
You didn't say if this was happening at night or daytime. If these holes are appearing over night and in the warm weather months, it could be skunks digging grubs. Generally they dig a small hole and pull the dirt out around the hole. You may not always smell the skunk but may notice a residual punky smell in the morning when you investigate the diggings.
No