I have a feeling that this is going to be one of my longer threads...so please bear with me.
I'm not sure if I'm going to be of help here. But I'll try ;) I feed a pre-made raw that I order from a company named Darwin's. (
Natural, Raw Dog Food, Grain-free Dog Food - from Darwin's Pet). I make myself crazy over how I feed my pups & I was scared to death to transition them to raw. So I decided to go with a premade to 1-make my life easier & 2-give myself peace of mind. So I don't actually measure & figure out the percentages by myself. I totally cheat :p
Regarding grazing vs scheduled feeding: I definitely don't let them graze when I give them raw. I'm just afraid that bacteria will start to form on the food if I leave it out too long. When they were younger, I fed them small portions 3-4 times a day. They never want to eat too much in one sitting. Now at 1 year, I still feed 3 times a day. Although, one meal may consist of only a Raw Meaty Bone.
I do feed them more than the Darwin's packaging suggests I feed. My poor puppies seemed to be starving with the amount I was feeding them :( It took me a few weeks to figure out the correct portion to give them. And I think I must have blown up Darwin's 800# in the process too. Thankfully, they have really good customer service. The Darwin's people told me that small breed dogs typically need a higher percentage of food vs. body weight than larger breeds (as in more towards the 4% rather than the 2%). So that made me feel better about giving them more food. Plus, mine were puppies when I started them on raw, so they were eating waaay more than 4% of their total body weight.
I was really concerned about overfeeding too. But I didn't weigh them. I just kept a close eye on their body structure to make sure they weren't getting too round & that I could feel their ribs. So I can't say that I even know how much weight they were gaining per week. I do know that both of my pups don't gain weight at the same rate. Plus, they were puppies at the time & were growing really quickly. So I'm not sure if that would have been a good way for me to monitor the amount of food in their diet.
I'd say that it took me about 2-3 weeks to really figure out a feeding program/schedule that worked for them. I based most of that on their behavior/reaction toward the food. I basically let them eat how much they wanted. Thankfully, they didn't gain too much weight & they seemed to figure it out on their own. I did bring them into my vet for a check up/bloodwork about 2 weeks after going 100% raw, and again at 1 month. Like I said, I'm a little anal (okay, a lot anal) when it comes to their diet. These little pups eat waaay better than I do.
At my girl's first "raw" vet visit, my vet noticed a high percentage of protein in my her urine. I'd have to look up the exact name of the protein that was showing up - I don't remember off the top of my head. She's a mill rescue & has a long history of health issues, so I was freaking out about kidney problems. Her levels weren't like that prior to going raw. So before I started a battery of expensive tests, I decided to change her diet. I gave her less Darwin's & started incorporating freeze-dried & air-dried raw into her diet.
I also gave her more fresh veggies. At her next vet visit, 2 weeks later, she was back to normal & has been ever since. So I don't feed her 100% raw anymore. In fact, I give her raw a good quick sear...so she's more of a "medium raw girl" these days.
My pups are no longer technically puppies. When I started noticing leftovers on their plates, I started feeding them less. I also started incorporating Raw Meaty Bones & tripe into their diet. It's all worked out okay for us. I suppose I just sort of followed their lead. I used to think my little girl was a piggy because she was eating so much! But she never got "fat". So I'm assuming that her body was telling her how much food she did & didn't need. Although, I'm not sure if that's the norm. That's just how it worked out in my experience. My Lab will eat all day if I let him. His 100 lb American Field body proves it :p
Anyway, sorry the post was so long. Hope it helps a little.