Hello, we have a new puppy who of course doesn't like being left alone, the main issue at the moment is just night times. We currently have a crate inside a playpen, where we always leave the crate door open, have a few toys in playpen and a bed in playpen too as well as crate with a mattress. However every night is non stop howling for past week since we got him (currently 9 weeks). Is it right for us to let him howl all night? We can't leave him on his own open as he will bite things he shouldn't still, just worried about traumatising.
We do still do the usual leaving him alone during day in playpen which he is actually fine with most of the time, take him for toilet and play with him before bed.