What are some signs to look for that a puppy may have worms?

Bloated Belly

Diarrhea

Increased appetite but not putting on weight

Skinny

Vomiting

And in severe cases, lethargy

Also sometimes you will notice worms in there stool.

But a dog can still have worms and show no symptoms at all,if you suspect your dog has worms take your pup to the vet and have a fecal test done to determine the type of worm or parasite so your vet can treat accordingly.

It will start with coughing, especially after exerting energy. They will be fatigued easily, and perhaps more reserved. Symptoms may take years to get bad though, so if you are suspicious, I suggest going to the vet and getting it tested.

they usually scoot their bums on the floor and sometimes throw up

bloated stomach, see them in the stool.

check its poop and check around its butthole and if you see white squigly creatures....well hes got worms