Asa maka palit senior dog food

Hi! Naa mo nailhan nga vet clinic or pet shop nga namaligya og senior dog food?
I have a 13-year-old male Labrador (22 kg). Currently, he’s eating Royal Canin Medium Adult, but I just realized it’s only recommended for dogs aged 12 months to 7 years.
I know naa’y Royal Canin Medium Ageing 10+, but wala gyud ko kakita ani sa mga pet shops ug vet clinics nga akong naadtuan.

Naa ba moy ma-recommend nga good senior dog food for large/medium senior dogs? Or basin naa moy nahibaw-an asa makapalit ug Royal Canin Medium Ageing 10+?
Salamat kaayo!