Some bones in stool is normal. Nothing to worry about as it is just passing out.

What you did was wrong, to carry him fast. You scared him, and made him try to gulp the chicken wing down because it thought you wanted to steal it away. Dogs are somewhat protective over food and shouldn't be frightened or threaten during mealtimes.

You should feed him in a quiet place, with newspaper around as some dogs like to eat their food on covered ground. Never try to carry or snatch away the food when a dog is eating and do not sit too close to your dog coz it needs privacy when eating too.

chicken wing and drumstick is not advisable to give. other body parts are ok like ribs, breast, keels etc.

Are you just starting out to feed your dog a raw meal? If so, undigested bones is quite normal for beginners as they are adjusting to the new kind of food and digestion.

If you want to teach your dog to eat at one place, you could put him in an enclosure like a playpen and lay out an old towel/mat for him to eat there. If he tries to bring the food away, don't carry him back. Take the food away gently by telling him 'Give' and put back on the towel/mat for him to eat. Do that a few more times and he will remember that the towel/mat is the only place to eat.

How big is your dog though? If he can swallow the whole chicken wing in one bite, then yes, the wing is too small. Feed pieces that are at least bigger than his head so that he can work and chew on it to clean his teeth more.

I beg to differ. I feed Scottie wings and drumsticks all the time with no problems. But I do add additional meat when I'm feeding wings coz wings by itself are too boney and too much bone can make the stools crumbly. If a person is just starting out however, it's a good idea to start with easy bone-in parts, like breast and keels. After they're used to it, just start feeding the other parts of the chicken.

I meant how heavy or big in size is your dog.. But you already mentioned that he's 5.8kg, so he's about the size of my Scottie (Scottie is about 6.7kg). It is entirely up to you if you want to feed once a day or twice a day. If you want to continue feeding twice a day, and want to feed pieces bigger than his head, you could just give a big piece, let him eat for about 15-20 mins (or as much as he wants if he knows how to regulate himself) and keep the rest of it in the fridge for the next meal. In the next meal, just let him eat everything. Me, I prefer to keep things simple, so I just feed Scottie one big meal in the evening when I get back from work

Are you feeding the BARF Model or the Prey Model Diet? If you're feeding the BARF Model, I probably can't help you much with it coz I feed the Prey Model diet to Scottie (which is basically just meat, bones and organs - no veggies, fruits or supplements) From your previous post, you mentioned only the chicken wing for your dog's first meal...is that all you are feeding? If so, it would be closer to the Prey Model diet. Try not to feed chicken wings by itself next time. Leave the chicken wing attached to a bigger part of the breast meat to ensure there's more meat, or just add more meat to the meal coz wings by itself is too boney. Was your dog's poo firm when he poo-ed after the first raw meal?

Sure, or if you're really concerned, just de-bone the drumstick lo Not every meal has to have bone...