Why does my dog eats dinner but not breakfast?

Why does my dog eats dinner but not breakfast?

The most common reason why dogs won’t eat their food in the morning and may eat later through the day is that your dog is accustomed to having full access to his food throughout the day instead of only having the opportunity to eat at the scheduled time for food.

Is it normal for a dog to not eat breakfast?

When dogs are going to get better on their own, improvement will usually be noted within 24-48 hours, but you need to know when that clock started ticking. If skipping breakfast is honestly the first sign of trouble and your dog seems to feel fine otherwise, waiting a day or two to call the vet is perfectly reasonable