No "normal" per se, but not uncommon. This is caused by the cat injesting flea eggs. Need to put the cat on Frontline or another anti flea medicine
Yes. It is normal to find live worms in your dogs stool if you got medicine that was over the counter. You should IMMEDIATELY go and get PRESCRIBED medicine.
Tape worms
No.
People can get worms from bad food or unclean conditions. Most often passed to humans through contact with pets. If you have a child with worms in it's stool, PLEASE take it to the emergency room NOW! Worms are parasites & damage the body, there is a treatment to get rid of the worms & it needs to be done asap.
Normally, primary care provider evaluate and treat worms.
It might be pin worms.
Roundworm If it is your dog you need to treat it for worms.
they could be round worms....your puppy would need to be dewormed
The best way is bring a stool sample to the Vet.
Worms
loose stool can be caused by two things. It could be diet or worms.
Have him checked by a doctor. A stool sample may be required for analysis.