My dog is 5 and is panting a lot more then she usall ydoes she has water, food and has gone out for a walk I don't know what is wrong and if it is worth worrying about.

Is it hot out?

Is it abnormally hot out where you are?

Dogs will often pant when they are in pain as well, check for any bruises or cuts on her gum or toung? Anything in her paws? Has she injured her self or over exerted her self recently.

How long has she had these symptoms? Has she eaten or drinken? If it is hot, try to keep her inside, and keep her comfortable but please be gentle. You should consult your vet. She could be dehydrated or a number of other conditions, so only your vet can really help you with this! Good luck! Does she have any other symptoms? Panting could hint at an increased heart rate which could mean many different things, it could be serious, or it may not be. Are her gums pale? Consider how she acted on her walk. Try to keep her comfortable until she can go to the vet.