Is Having Two Puppies From The Same Litter Bad?

i bred cockapoo puppies and have a buyer wanting two puppies. iv’e heard though that it’s bad to do that because they don’t have to love you because they always have each other.
also that they’ll never learn thier name because you’re always saying two, and if you yell at one the other thinks he’s being yelled at, resulting in them never getting trained.
any help??

Can I Train My Puppy (cockapoo) To Use A Kitty Litter While No Ones Home?

I have a young baby Cockapoo & was wondering if there is a way i can train him to use the kitty litter when no ones home. That way i can go to school not having to worry as much.