[ashogo]

The first one means, "I love my baby".
"Ai" means love, and "shite" is a form of "suru" which means to do something. In this case, loving.

The second one means "Girls love her dog".
"Daisuki" is a combination of "Dai" (literally "big" or "great") which is used to emphasise something, and "suki", which is to like. So together it means they really, really like the dog.

I bet some of the regulars here could give you even better details. Hope this cleared it up for you.