Weight is an important factor to determine the overall health condition of your dog. It is quite similar to the human as it certainly is not necessary that a man who is having more weight is healthier, in fact, it can go the other way as weight is considered to be a problem in most people. Similarly, you must also keep a close eye on the weight of your dog as it can be an indicator as which way your dog is going, i.e. if he is getting healthier or otherwise. There are specific charts and indicators of weight according to age that are usually according to your dog's breed. However, you must always have one of the charts for you to see if your dog is on right track.
For most of the people it can be serious problem if their dog is gaining weight. Although, you can find out a specific chart or relative information for the ideal weight of your dog, however, there certainly are few of the things that you can use to find out the weight of your dog and can classify it into a category.
First thing that can help you to decide is the observations. You must observe the prominence of ribs and bones. If these are visible to a good extent then you can call your dog a thin one also, you can check for the fat covering. However, if you don't find ribs prominent and also find a covering of fats, then you must take your dog to your vet to find out if that is normal for your dog or is he going towards obesity which certainly is not a good thing for your agile dog.