Do I need to start hecs on the mature food?

He's 4 today, I'm just wondering if I should be buying him the mature food now?

I would say no. My two are also 4 and I'm not planning on switching over any time soon. They're still like a pair of spring chickens

I didn't start Thumper on it until she was much older than 4.

That's what i was thinking, he's still really active and i don't want him to lose weight!!

MJ and Philip are on mature food, but thats because I'd started T (and therefore also MJ) on it. She was 9. Philip and MJ are 5-6.

I've had Henry on SS4+ since he turned four but I did so because I thought about the longevity and size thing (bigger buns don't live as long as small). Henners is medium to large and as he was a rescue with previous diet unknown I weaned him onto SS4+.
Now, with his appetite not what it was because of his heart condition, he rarely eats a quarter of his old daily nugget allowance but he does eat about 1 and 1/2 scoops of Protexin-Profibre and plenty of wild forage (I dread what he will do when the forage is gone and it's getting poorer everyday).

I havent moved Daisy onto mature food (he's 8 now) as I feel like hes doing well as he is. Hes not a kit by any stretch but he is happy and still binks like a loon!