As long as it is mixed with the food or included in the water bowl, full strength Organic ACV is fine.
For a dog, is there any concern with everyday use between the full strength acidity when put in the food and the esophagus? For everyday human use, I read that it should be diluted so I make a lemony, Manuka honey and cinnamon drink for me. It has been an amazing energy booster for me. Wonder if that drink would be good for a dog also.
You "could" give honey but remember it is high in calories and can cause diarrhea in some dogs.
Manuka Honey has antibacterial and anti-inflammatory properties.
It is fantastic for wounds or infections and hot spots.
The UMF strength must be at least 10 to 15+ for this type of use.
Raw "Local" Honey (from a honey farm close to where you live) has had success for some dog's allergy condition's.