2yr Old Akita - Is New Mom Shedding Too much?

Our Bella had her first litter late January 2025. She's never been a heavy shedder, usually w/season change it's heavy. Our male does enough shedding for us all, year round.
Since she had the pups she's lost all her baby weight plus some and the shedding is beginning to alarm me. Her hair is coming out with every touch. No bald spots but it's thin THIN!

In January we changed her food to the puppy plus Lactating Mom brand from our local feed store. After she weened the pups we changed her back to the regular adult dog food. We used Wellness Brand for the first year of all our dog's lives. Now we've switched to Costco's brand, which they all seem to like. We drizzle a bit of coconut oil (1T) over the dry food & they like that too.
Her thick double coat appears to have vanished. She was very stressed concerning her pups and has now adjusted to having just one around. Before pregnant she held steady at 105lbs. She weighed 127lbs before the birth. Today she's at 95lbs and she's looking awfully thin. This was our first litter too. I use ACV for everything but have no idea what works for our dogs. They are my sunshine on cloudy days! Please Help!

Any suggestions of what to do? Thanks!