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Join Date: Apr 2018
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Just some info, if your dog is not an athlete and running hard for 3-5 hours a day in the field, a 30/20 is A LOT of extra protein and fat. That much fat can keep a dogs stool loose if it's not burning it off and that amount ot protein can be quite a bit of excess as well. Too much protein can also lead to kidney disease as the phosphorous in the protein is what causes kidney disease.
Also, with feeding a premium food, you shouldn't have to add so much to the food. You're adding in a lot and that means you should be subtracting from the kibble to not over feed, By doing that to the degree you'd have to, to not over feed, means so much less kibble that you're removing a lot of the vitamins and minerals that's in the kibble that makes it a balanced diet. The general rule here is that around 75% of the dogs intake should be the kibble and 25% makes up anything you add plus training treats.That makes sure your dog gets the right amount of the vitamins and minerals from the kibble and not to over feed so the dog doesn't get overweight. the fact that they have eaten all that before and now can't could just be that they are now 18 months old and their systems just can't handle all that extra.
Just don't over think it and try to reinvent the dogs diet. Pick a food to feed be it kibble or raw diet and the brand and keep that as a base and a couple times a week offer some veggies if you want and just feed half the amount of kibble those meals. And rotate the treats around. grab a couple this month and a couple different ones next months instead of buying 4 and using all 4 each month (just an example).
Again no need for supplements as that can become an issue. For example, Vitamin A can be toxic in excess and if they have enough in the food then you are causing an overdose of vitamin A. In a healthy dog on a premium food there is rarely ever a need for supplements.