My dog yelps now and then he snorts true his nose like hes having trouble breathing i brought hime to the vet 2-3 times and got x-rays he has spots on his lungs and they think its kung worm but no symptoms of lung worm is yelping he is eating and drinking ok and is going to the batroom any idea’s?

Also, how often should I feed them?
(i have 2)
Can I feed them the brown fish food pellets or do they only eat blood worms?

Do round worms and flat worms affect the same area of the body or do they have specific areas of liking?