what is not present in kibble brands like pedigree that are in SO CALLED GOOD brands like Royal canin? what makes royal canin so expensive and pedigree so cheap

This is a follow up post about a question made before. I asked what do experts think of holistic food brands and why they are not talked about as much as other types of food. By holistic I mean brands like Taste of the wild, whole farms, Blue, etc. Brands that serve more protein and "higher quality ingredients". Instead I see more of Purina or other brands that dont have higher amounts of protein or better ingredients.

Can I mix dog food of 2 different brands and pour gravy food over it,the brands I am mixing are Arden Grange,fiddle and drools?

Is it ok to feed a rotational diet? Using up to 5 brands total and switching monthly? I like several different brands and I don't want to have to choose.

Any recommended brands for toothpaste and tooth brush?

Can switch between brands and flavors monthly? I would use 5 different brands because I like these and I can't choose. Is this ok for my dog? Why or why not?

I've heard that by using several different brands (one at a time) that it can ensure your dogs diet is more balanced. Is this true, is it a good idea to rotate brands? Why or why not? Thanks!

Vanessa yeager told me that only royal and purina science diet and pro plan are the good dry food choice there 1000 pf brands that are in the top above them in all the websites and are an the food advisor site and more expensive how there are only 3 brands that are suitable for dogs among all of this highly rated brands by all users as taste of wild earthborn and many many more better than them. Note: i live in egypt only royal is available and it is very very expensive to afford●

Are Fromm, Orijen and Acana good brands? Will they have the same results as companies who have done more research? Why do so many people say corn, soy, wheat and by products are bad for dogs?how do you feel about grocery store brands? I've also thought these were not good. There's conflicting information out there, so I'm confused. Can you explain to me why the top selling brands are indeed good for dogs? Thanks!

For a baby pit, what would you recommend as far as shampoo ..any specific brands?

I was curious as to what is the best inexpensive brands for flea and tick treatments. We used to use Hartz, but I've been seeing a lot of horror stories surfacing the net about how people have been losing their pets due to something used in this brand. Is there any other brands I need to avoid? TIA.

Iam sorry but this answer was not helpful 100% I should but the italian brands in my situation or not• And i want to know what should i loof for in the nutrition facts and ingredients to know if it is a good dry food brand or not for my dog i have in my country italian german brands and other countries