Sorry she is still not feeling well.....She is a cutie and I am sure your mom is worried sick about her.....Not eating when they are going through heartworm treatment is very common....it is other things in addition to it...such as loose stool and vomiting, coughing, not wanting to drink water, dehydration that you have to be concerned with in addition....Then....there are also some dogs that just can not take the injectible treatment, the injections make them sick....do you know what they are using to treat her with?