A hotter day or dry food can make a dog drink more. But sudden or persistent thirst, especially with more peeing, accidents or illness signs, deserves a closer look.

A little smell after food is one thing. Persistent, rotten, sudden or worsening bad breath can be a sign that your dog’s mouth needs attention.

Many dogs eat grass, and it is not always a crisis. But if your dog eats grass obsessively, vomits repeatedly, seems unwell or may have eaten treated grass, it is time to look closer.

Dog food labels can look reassuring, but the key word is often small: complete or complementary. Here is how to read that label before turning a topper, treat or mixer into your dog’s whole meal.