It was hurting my knees to walk up the stairs in my house

(we are in our 50's and his knee aches time to time.

This is not a good feature, if you have bad knees it doesn't work for you, at least not me made my knees swell up really bad

My knees are a little dodgy and don't like inclines

This is coz i have bad knees and cant take him for long walks but only short sniffing walks

Since hurting my knees I have good days and bad days.