Jope, Dog is Human, NAD?

Hi!

My Pomeranian Chihuahua mix is turning 15 this year. She still looks amazing but walking is getting harder for her. Her back kinda comes up and her back hips and legs struggle sometimes. I end up carrying her for 70% of her walk and she walks the last block home. She can still run and walk fast in bursts when she’s excited but sometimes her back leg gives out or gets stuck on uneven grass etc. She gets so frustrated because she wants to play and run so much.

I keep seeing Instagram ads for Jope, DogisHuman, and I saw something with NAD. I currently give her Wuffes and I think it’s helped but it’s been a year now and I wonder if I should switch it or add something to it.

Can anyone share their experiences?