Thanks for the responses in my earlier post (regurge:hate to bring this up). I have since been to the vet and Lucy was prescribed a probiotic paste called Acute Care which contains probiotics and digestive enzymes. There is a noticable improvement in her overall health. I have fed her two pinkie heads successfully since starting this treatment. Today I am off to buy a scale so I can keep track of her weight closely. By the way, my vets purpose for me feeding her canola oil was to give her a quick boost of nutrients and stimulate her digestive tract. There were no ill effects that I noticed.
Thanks again for everyones feedback. It's muchly appreciated