That's great that it's getting better! It's good to have on hand when you can check their feet regularly and catch things early. I get it from Amazon:
https://www.amazon.com/dp/B073VDPQD...&crid=3KT8TLZNRX4TY&=&sprefix=colorless+io
https://www.amazon.com/dp/B073VDPQD...&crid=3KT8TLZNRX4TY&=&sprefix=colorless+io