I think my dog might have a minor/major problem

I know his could be weird talking about this on a website but I really want to let it out. My dog was in the kennel for a week and my dad picked him up a few days ago. He is his usual hyper mellow self on Monday. However today, he acted different. He didn't eat much, just laid down for most of the time, and have spit in his mouth. One thing I found out that he had a flu shot at the kennel. I am really worried about this. When I first got got my dog last year, I was learning how to dog training. It was a rough start but I got used to it and I really care about my dog. I don't want my current dog to end up like my last dog. My last dog died from something that was in his stomach that twisted. My dad is going to take the dog to the vet tomorrow as soon as possible to see what is happening. I really hope nothing happens.

My current dog is a German Shepherd that is a year and few months old. Really mellow dog.

I'm sorry to hear about your German Shepherd. Let us know how the vet visit goes! Hopefully it's nothing.

I'm also very sorry to hear about your dog. I hope he will be okay. De you think he could he have eaten something weird?

My best wishes to your dog and your family.

Thank you guys.

My dog apparently got a infection, he is taking medication and he's eating more due to it.

Glad your dog is fine.If you look on my profile you will see my love of my life "My Dogs" And I'm very involved in helping them,Pledging to protect them from abuse.My little ones are not mellow by no means.My husbands English Springer Spaniel are calm,Mellow.But they are known to hunt down birds.One got very ill due to eating something as well.clogged his stomach.Ending is after much money spent he's back to being Luke.

Was going to reply to this, but I am glad to hear your dog is better. My wife and I love dogs and we have two yorkies.

I hope he's okay. :(