My 17 month old currently eats a lot of marshmallows... and watches a lot of Justin's house...
Generally, she copes pretty well, but I do resort to treats if she is screaming at me for attention and I just can't give it.
I also have a dummy for LO, to try and pacify her with if I just can't quite start/finish a feed yet.
I also always try to feed LO when DD1 is having her nap.