My Dog is usually hyper and very playful and get excited when he saw food but since yesterday he doesn't want to eat. Well, yesterday I made him eat some treats and now he don't want to eat anything but he still drinks water. He also vomit 2 to 3 times and he seems like weak. He is also an outdoor dog and I'm not sure but I think that he swallowed something. Is it something else or just because of our hot weather (in Philippines)? What should I do?

Why is he out if it is so hot? You don't say how old he is, or what kind of dog; your description doesn't sound good, but of course he will eat treats if he doesn't like what you are offering as dog food. What does he normally eat, by way, what kind of dog food?

We can't diagnose your dog's symptoms here and tell you what to do for him. I would suggest you get him to a vet for a check up if he is vomitting and if you are worried he might have swallowed something. How do his stools look, are they runny, can't pass them? Is his stomach bloated?

Tick has all the right questions. It certainly could be the heat, among other things such as parasites, infection, blockage, could he have had a run in with a poisonous spider/snake/other creature?

Is he in a fenced yard? Does he have access to shade, fresh water 24/7? Is he up to date with vaccines?