My border terrier is now 4 1/2 months old. I'm puzzled as to whether she needs the middle feed. She's on Royal Canin mini/junior and is a well grown solid pup. Its many many years since i'v had a puppy and finding quite daunting!
Any advise please.
Thanks.

At 4.5 months I would still be giving 3-4 small meals a day.

Remember it is down to the size of the pups tum as to how much food it can take at one time, which is why it is best to give 3-4 small meals until the stomach has stretched to accomodate larger portions instead of small and often. I wouldn't be giving a 4.5 month pup two large portions just yet, but still split the food into smaller portions and spread it throughout the day. That way the pup won't be bloated and the stomach will stretch naturally.

I reduce my 2 small breeds down to 3 meals a day at 16 weeks.  Still give the same amount of food, but split 3 times instead of 4.  Feed Royal Canin mini junior too! 

I don't reduce down to 2 meals until at least 6 months of age.  They then stay on 2 meals a day for life.

i would say 3-4, probably be ok with 3 but no less... good choice with the royal canin

I reduced my BT's meals to 3 at 3mths old, she still has 2meals, shes 7mths at the moment.
She is a very good eater and has 2 meals of skinners and tripe or chicken daily.

Thanks so much for your advise. I was just following the breeders feed sheet which advised cutting to 2 meals from 14 weeks which I thought too early.So shall keep her on 3 untill shes 6 months old.
Thanks again.

I always tend to stick to 3 meals until 6months or until the dog starts to ignore one of the meals and then drop down to two

My GR is 5months this week and still has 4meals,although one of the meals is smaller than the others.