Casing the joint

I’ve been doing local agility classes with my 7 year old Lab x for the last three years and he loves it. However I’ve noticed that he’s started showing signs of stiffening up, especially in this cold weather. It’s not severe enough for medication but I’m looking into supplements...

What would you advise to help keep him supple, we’d both love to be able to carry on with the classes?

Thank you,

Jill, by email