Is an Invisible Fence good for dogs?

It depends on what you mean by hurt. The dog gets a small shock, which doesn't feel good, so you could call this hurt. However, the dog doesn't suffer any lasting damage from the invisible fence.

No. They are effective, but if they were in the least dangerous, they'd have never made it into the marketplace,simply because of the potential lawsuits the manufacturer would face.

Because dogs stay really depressive, when they are alone, and can eighter scape or die of depression...

Maltipoo dogs are very friendly they are good with children and adults they love people and do not shed. So yes, maltipoo dogs are very good dogs.

I've heard they are pretty good dogs. Mine is great, not good around little little kids but every dog is different.