Good morning and welcome from the UK!
Your baby is obviously very attached to you - and I bet you wouldn't have it any other way...
What a wonderful life you're creating, and sharing, with him...
And, I think,
therein lies the problem!! All he's used to, when you all go out, are wonderful times...all the best doggie-times in the world!
He probably thinks you're all out doing these wonderful things
without him, when you have to leave him at home....how can he know any different? I personally think his howling is his way of telling you off (we had a Schnauzer that used to do the same, it never really stopped, but it got quieter as he got older!!).
Good luck to you all, oh and congratulations! Sally + Harry
x