We use salmon oil for Brooke. We put two pumps on her dinner every night. It says on the bottle how many pumps to give depending on the weight of the dog. Brooklyn LOVES it. When we first started giving it to her she would suck the oil off and spit out the food all over the kitchen, then go eat it later when she realized she was still hungry. Not sure if there are any differences with pill vs pump except maybe if the dog isn't fond of the taste the pill would be easier to get them to eat. It has helped Brookes immune system improve and her fur grew back in sooo beautifully after she got over demodex mange. I also read somewhere on here that it is good for joints and can replace some of those supplements.