to what age will a mastiff grow? How long should you feed puppy food?

Asked by Member 725686 on Sep 3rd 2008 in Food & Nutrition
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He will probably grow until the age of 2 & then continue to full out until the age of 4.
I wouldn't feed puppy food to a Mastiff at all but rather find a good quality adult food...Do not feed anything that contains corn!
Good luck!

answered on Sep 4th.

Other Answers



Large breed dogs will continue to grow until they are about one year old, maybe even a little older. Then they will go through a "teenage" phase after which they usually fill in more in terms of weight - usually around 2 to 3 years of age.

Most veterinary schools these days agree that large breed dogs should not be fed puppy food at all, but should be instead raised on adult food. The higher levels of nutrients in most puppy foods can cause dogs to grow at a rate faster than their bones and joints can handle, which leads to a painful medical condition called Pano ("growing pains") and puts undue stress on their bodies.

On the other hand, pups weaned directly onto adult kibble or onto a healthy raw diet have much lesser percentages of pano, and dogs on raw are generally pano free altogether.

Abby answered on 9/3/08. Helpful? Yes/Helpful: No 0 Report this answer


I've heard that large dog breeds will grow till 3 years old. I own a english pointer, when he was 6 months he weighed in at a mere 65lbs, he kept growing till 3 and is now 27-27.5 inches tall and weighs 85lbs.

With my current almost 9 month old puppy, we were feeding her puppy chow but i've heard for large breeds, the hormones in the food can make bones grow too fast...we switched her to adult food by 5-6 months old. She is doing great and she is still growing. Lucky for us it was also cheaper to feed both dogs the same food

Member 623383 answered on 9/4/08. Helpful? Yes/Helpful: No 0 Report this answer