Glad to hear papa dog is getting neuterd soon & mommy is too after her pups!!

I would put her on a high quality puppy food asap, but switch her over gradually.

Ussually a mom knows when too hard is too hard, unless she is very young &/or high strung, also sometimes first time moms may not know just because of lack of experience or they may not care about the pups. I would monitor them when they play, If there is toomuch rough housing, especially in the tummy area I would seperate them.

Each dog & breed is different but you should start to see her tummy get a little bigger within a month or so. They are ussually pregnant for about 63 days (15 weeks).

good luck & can't wait for pics!!!