
Yup, he sounds a happy fit healthy young staff... leave him be!
My collie x thing, now he DOES need some extra dinners (and is getting them)... we have had an upwards/lengthways growth spurt
and suddenly he has gone from being lean and fit to being ribby and spiny... so more dinners and it will even out.
Im sure a lot of people cuddling Pteppic rightnow would say 'BLIMEY, he is emaciated' and yes he feels it, but he is happy, energetic, and still on three meals a day -- its just a growing phase, he is 7/8 months old and when he stops growing suddenly upwards or backwards or sideways (or just his ears), he will put on muscle and mature.
Em