Hello

I have fed my mastiffs royal canin for 5 years, Ive recently noticed after becoming a newbee to showing that my dog is rather large for her age, Does anyone know of royal canin making dogs grow too quick??? I did have them on giant, but now i have them on maxi as it has better % of everything a mastiff needs, They do have perfect coats and bone stucture, but im really concerned about the size, most of my feedback is "put on diet" when they havent seen my dogs! , but there not fat there just big! Im positive this must be the royal canin, does anyone else have this problem?

A good quality food I don't believe will make the dog taller than it was going to be.  If the judges are saying " put on the diet" then that is what it needs :-)  If it was the height only and not the weight then they would say " On largish side"  ..or similar.

Each dog does require different amounts of food. Reduce the food a little till she is the right weight.

The problem most people have when their dogs are carrying a bit of weight is they have got so used to visually looking at them they often can't see they do need to lose weight.

It is not a regular thing any judge would write unless they felt it really needed to lose weight. I personally have only read it a couple of times in my life show in my own breed and those commented on DID need to lose some weight.     People often accept extra weight as  bone and size substance , they are not the same in my opinion.

We have a gorgeous Staffie Bitch who, coincidentally, is on the large side of the breed standard.
She was always good looking and carried her size well (not barrel shaped or tubby, just looked solid), but upon receiving a couple of comments from vets that she could stand to lose a tad, we bought a perscription diet for about 6/8 weeks and then changed her to J. Welbeloved. She lost a small amount of weight and is a different dog, like a pup again !!!
After this she was neutered and has still maintained a healthy weight, and has soo much energy. This was quite strange to me, as I never thought she lacked energy. Jess is 5, 6 in April.

Until being told by the vet, nobody had ever said my dog was fat. In fact most I see are as she was, it isn't until you start to see the experts and the change in the dog after losing a little weight that you realize there was a problem. I put most of it down to people messing with and not understanding breed standards, as this leads to confusion of what the correct standard is. For bull breeds I see many overweight, as this makes them appear bigger!!! I'm not saying this is what you have done, just that it becomes the norm for size / weight when that is mostly what you see. Of course upon going to breed shows, where the standard is the norm and what the  judging is based on you see a whole other story.

When I say Jess lost weight I mean between a kilo and kilo and a half (maybe a little different for Mastiffs, just due to relevant % in size and weight), and the difference is noticable after even 750g by looking at the waist area near their hips at the back.

Jess also ate R.Canin for around the 1st 2 years, but went off it!

I have never found a food that actually makes them grow more.  What some people consider to be normal weight for a pet maybe to big or small for the show ring.  But get a judge or a breeder to give you an honest opinion.  If your dog if tall/big then she may not win big due to oversize which does happen occasionally.  You might have just got the big girl of the litter.
Emma