It can be very difficult to house train a dog that eats all day long. Snacks and treats Snacks and treats are just doggy junk food. They should not be considered a dietary supplement. They are much more like fattening desserts such as cakes and cookies. This is not to say that they should never be given, but be sparing and prudent with them.
Many dogs become obese by eating treats.
Again, it is best to maintain the dog on the same type and brand of dog food. This leads to more consistent eating and defecating habits and makes it much easier to regulate the dog's weight. Sometimes it may be desirable or necessary to change the dog's diet, for example when making a switch from puppy food to adult food or when a particular food becomes unavailable. It is very important that the change to a new food be done gradually. Any abrupt change in food will lead to diarrhea and vomiting.