When do border collie boys stop growing (height - filling out - fur) he is long coated?

Question

border collie males I should say lol - he is 16 months and has reached full height (i think) but his coat doesnt look even and he is still super skiinny - no matter what we feed him

also are there any foods which enrich their coats and make them a bit bigger (not fat)

????

Answer 1

We have a girl border collie and the vet says she is built for speed not comfort - they are rarely fat dogs, although ours did fill out a bit when she was spayed and males will get larger if you have them neutered.  Raw eggs are good for them and high in protein so may make the put on weight but not every day - 3 - 4 times a week

Answer 2

I feed Boston on Burgess Supadog. He's a long haired chunky collie. Very active, very strong and very loyal. I assume he's been multi wormed.