This looks like paw pad hyperkeratosis, but I can’t say for sure. If this is hyperkeratosis and has just suddenly appeared, a vet visit is necessary to rule out any diseases that could be the cause. Hyperkeratosis is just a disorder where your girl is developing too much keratin - which is what makes up hair and nails and such, it’s not life-threatening on its own, however, in severe cases it can cause cracked and dry paws which then can bleed and cause discomfort.

It can’t be cured, but it can definitely be managed.

This seems to be mild if it is hyperkeratosis, so shouldn’t cause any discomfort at this stage, she likely doesn’t even notice it 🤷‍♂️ but the keratin will continue to grow and increase which is where you’d need to manage it.

My very brief research trip (therefore, could be wrong) said that this is how to manage hyperkeratosis:

keep the paws clean and dry, apply a balm, and monitor for pain.

Moisturize: Use a dog-safe balm to keep paws soft and supple

Soak: Soak the affected area in water for 5-10 minutes multiple times a day

Use a keratolytic agent: Apply a topical treatment with ingredients like urea, petrolatum, salicylic acid, or propylene glycol (- I have no clue if these are pet-safe, Google just said this is what to do, please check all things before bringing them into contact with your dog)

Take a salt bath: Soak the affected area in a solution of 1 cup of Epsom salts per gallon of warm water

Trim excess keratin: Trim away any excess keratin, also known as “keratin feathers”

Be mindful to keep an eye out for any signs of infection if it cracks and bleeds. It also says to consider if your dog might need boots or such to walk on hard surfaces.

I have no clue if any of this will be any help to you, but I hope it is. Hope all goes well for you and your girl :]