I have a older bitch..
I just accept the next day she not going out hunting.. Give he a short walk to help loosen her up,fed good grub and give her a good rub down.
I just try and take mine 3 times a week lamping.. Daytime dont seem to effect her as badly. I have heard folk recomend cod liver oil for joints, I think Bootsa is more on the money with anti inflamatories is musclur discomfort, fatigue and old age.
It so gutting seening a older dog slowing up and ageing..