Hi,
interesting question...
We have goats - 75 infact, yep a proper goat farm. And we have had the "pet" ones that have been hand reared. Pets need more interaction, livestock are fine on their own. If they are still having bottles, then they really do like to be around their "mum" (you!) ALOT and will cry for attention. As others have said, they do like company, when we have had solo's being hand reared, we've had one become attached to a sheep, and another to our dog. I think they are a great animal, enjoy!