it depends entirely on the breed on average all the growth plates on a basset aclosed at 12-16 months of age. at that point puppy food does not have any advantage plus the disadvatage of higher caloric density The typical age to ween off of large breed puppy food is 12 months, back in the day becore large breed puppy food it was 6 months or earlier. That said al long as you maintain the dog at a healthy weight it really is not going to matter much. when you switch.I've heard some places say that dogs are still puppies until they are 2 yrs old...
Depending on the mg the dog is getting from the dog food it is unlikely that 200 mg is going to be a problem. but keep in mind you need to investigate vitimin D levels as well might be exceeded as well.Surplus calcium in the presence of natural amount of vitamin D causes the metabolism disorders in the organism and hampers its' normal growth.
This effect was clearly demonstrated in the experiments of Dr. Hazenwinkel. He compared the development of Great Dane puppies at different amounts of calcium in their diet:
5 puppies received 1.1% calcium.
6 puppies received 3.3% calcium. Puppies that had surplus calcium (3.3%) grew slower, had bad appetite and incorrect position of legs resulting from bones deformation.
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Preventive: do not exceed daily dosage of calcium (500 mg per 1 kg of puppy's bodyweight and 259 mg per 1 kg of adult dog bodyweight).