I have a 2 year old cat that was bottle fed and he still roots. He doesn’t
do it all the time, but if I take him in my room just the two of us, he
will root to the point where he will push you out of the bed or put
bruises on you. Oddly, sitting in the middle of my bed was usually where I
fed him and that is the only place he roots. But, I don’t think he will
ever outgrow it. He definitely wasn’t weaned too early from the bottle as
he bottle fed until he was 10 weeks old (I got him when he was 3 weeks
old – the owners let the mama cat out and she got hit by a car). Yes, he
was eating food at 6 weeks, but he got a bedtime bottle until I ran out of
formula. Rotten. Spoiled rotten.