my 2 year old maltese

Question
how you doing my puppy snowey f, went from being very active to being lazy and breathing very hard.I don't know  if this have anything to do with it but we do feed her table food sometimes and she also just got out of heap.If you have a answer to the laziness and breathing hard please respond.

Answer
If you meant she just got out of heat then she could have an infection in her uterus. Dogs that are not spayed run the risk of having many problems and infection and cancers that dogs that are spayed don't get. Dogs breath hard when they are in pain or sick. Of course they breath hard when they are exercising, but she is not running, right?

If she is still breathing hard after you read this from this morning then you should get her into a vets. You should get her spayed once she is better from whatever this is.

Feeding her table food also puts her at risk for pancreatitis, which can be fatal and small dogs seem prone to it, and for gastritis and obesity.

These are not good practices if you want her to live a long healthy life.
Get her on a good quality food such as Science Diet adult formula and she won't need any other food to keep her healthy.

Please get her into the vets as soon as you can and have her looked at. While you are there, make an appointment to get her spayed.