Normal hair loss?

Hello folks - Trying to determine if my Malamute's shedding is normal or if a visit to the vet is warranted. This winter she seems like she's shedding more hair than this time last year, and for a longer period of time. She has thin hair around her face, where normally it's much more full. First 3 pictures are from last Dec/January, and the last 3 are from the last few weeks. We've had some extreme temperature swings in my area this winter (it was in the 60's in Maryland early December, and dropped to 8 degrees last week, back to 60's today). Her behavior is normal, but it seems excessive to the point we've joked that she looks like she's on Ozempic. If it continues I'll take her to a professional, but wanted some thoughts from other owners. Thanks